Issue Description:

Server crashed when I was using dropper, hopper timer, extra utilities' pipe, and well of suffering to autocraft slates on my private server.

What happens:

---- Minecraft Crash Report ----

WARNING: coremods are present:
EnderCorePlugin (EnderCore-1.12.2-0.5.20.jar)
OpenModsCorePlugin (OpenModsLib-1.12.2-0.11.5.jar)
Contact their authors BEFORE contacting forge

// Would you like a cupcake?

Time: 4/29/18 2:02 AM
Description: Ticking block entity

java.lang.NullPointerException: Ticking block entity
at WayofTime.bloodmagic.altar.BloodAltar.updateAltar(BloodAltar.java:304)
at WayofTime.bloodmagic.altar.BloodAltar.update(BloodAltar.java:244)
at WayofTime.bloodmagic.tile.TileAltar.func_73660_a(TileAltar.java:46)
at net.minecraft.world.World.func_72939_s(World.java:1832)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:765)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
at java.lang.Thread.run(Thread.java:748)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Thread: Server thread
Stacktrace:
at WayofTime.bloodmagic.altar.BloodAltar.updateAltar(BloodAltar.java:304)
at WayofTime.bloodmagic.altar.BloodAltar.update(BloodAltar.java:244)
at WayofTime.bloodmagic.tile.TileAltar.func_73660_a(TileAltar.java:46)

-- Block entity being ticked --
Details:
Name: bloodmagic:altar // WayofTime.bloodmagic.tile.TileAltar
Block type: ID #1125 (tile.bloodmagic.altar // WayofTime.bloodmagic.block.BlockAltar)
Block data value: 0 / 0x0 / 0b0000
Block location: World: (-305,70,175), Chunk: (at 15,4,15 in -20,10; contains blocks -320,0,160 to -305,255,175), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Actual block type: ID #1125 (tile.bloodmagic.altar // WayofTime.bloodmagic.block.BlockAltar)
Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
at net.minecraft.world.World.func_72939_s(World.java:1832)
at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:613)

-- Affected level --
Details:
Level name: world
All players: 1 total; [EntityPlayerMP['player1'/503248, l='world', x=-306.42, y=71.00, z=176.45]]
Chunk stats: ServerChunkCache: 617 Drop: 0
Level seed: 1782156935021828874
Level generator: ID 06 - BIOMESOP, ver 0. Features enabled: true
Level generator options:
Level spawn location: World: (-89,64,228), Chunk: (at 7,4,4 in -6,14; contains blocks -96,0,224 to -81,255,239), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 85188126 game time, 15542228 day time
Level dimension: -1
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 48415 (now: false), thunder time: 73757 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:765)
at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:396)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:666)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:524)
at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
Minecraft Version: 1.12.2
Operating System: Linux (amd64) version 4.8.0-59-generic
Java Version: 1.8.0_131, Oracle Corporation
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 2607325872 bytes (2486 MB) / 4260102144 bytes (4062 MB) up to 7481327616 bytes (7134 MB)
JVM Flags: 14 total; -Xmx7g -Xms4g -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseNUMA -XX:+CMSParallelRemarkEnabled -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:+UseBiasedLocking -XX:UseSSE=3 -XX:+OptimizeStringConcat -XX:+UseFastAccessorMethods -XX:+AggressiveOpts
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 104
FML: MCP 9.42 Powered by Forge 14.23.3.2655 50 mods loaded, 50 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

State	ID	Version	Source	Signature
UCHIJAAAA	minecraft	1.12.2	minecraft.jar	None
UCHIJAAAA	mcp	9.42	minecraft.jar	None
UCHIJAAAA	FML	8.0.99.99	forge-1.12.2-14.23.3.2655-universal.jar	e3c3d50c7c986df74c645c0ac54639741c90a557
UCHIJAAAA	forge	14.23.3.2655	forge-1.12.2-14.23.3.2655-universal.jar	e3c3d50c7c986df74c645c0ac54639741c90a557
UCHIJAAAA	openmodscore	0.11.5	minecraft.jar	None
UCHIJAAAA	jei	4.8.5.159	jei_1.12.2-4.8.5.159.jar	None
UCHIJAAAA	abyssalcraft	1.9.4.7	AbyssalCraft-1.12.2-1.9.4.7.jar	220f10d3a93b3ff5fbaa7434cc629d863d6751b9
UCHIJAAAA	baubles	1.5.2	Baubles-1.12-1.5.2.jar	None
UCHIJAAAA	endercore	1.12.2-0.5.20	EnderCore-1.12.2-0.5.20.jar	None
UCHIJAAAA	enderio	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderiointegrationtic	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	mantle	1.12-1.3.2.24	Mantle-1.12-1.3.2.24.jar	None
UCHIJAAAA	tconstruct	1.12.2-2.9.1.65	TConstruct-1.12.2-2.9.1.65.jar	None
UCHIJAAAA	acintegration	1.6.2	AbyssalCraft+Integration-1.12.2-1.6.2.jar	220f10d3a93b3ff5fbaa7434cc629d863d6751b9
UCHIJAAAA	aether_legacy	1.12.2-v2.0	aether_legacy-1.12.2-v2.0.jar	None
UCHIJAAAA	forestry	5.8.0.267	forestry_1.12.2-5.8.0.267.jar	None
UCHIJAAAA	binniecore	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	binniedesign	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	genetics	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	botany	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	extrabees	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	extratrees	2.5.0.163	binnie-mods-1.12.2-2.5.0.163.jar	None
UCHIJAAAA	biomesoplenty	7.0.1.2361	BiomesOPlenty-1.12.2-7.0.1.2361-universal.jar	None
UCHIJAAAA	guideapi	1.12-2.1.5-60	Guide-API-1.12-2.1.5-60.jar	None
UCHIJAAAA	bloodmagic	1.12.2-2.2.8-91	BloodMagic-1.12.2-2.2.8-91.jar	None
UCHIJAAAA	botania	r1.10-353	Botania+r1.10-353.jar	None
UCHIJAAAA	cfm	4.1.5	cfm-4.1.5-mc1.12.jar	None
UCHIJAAAA	chesttransporter	2.8.8	ChestTransporter-1.12.2-2.8.8.jar	None
UCHIJAAAA	conarm	0.0.11-a	conarm-1.12.2-0.0.11-a.jar	5d5b8aee896a4f5ea3f3114784742662a67ad32f
UCHIJAAAA	enderiobase	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderioconduits	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderiointegrationforestry	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderiointegrationticlate	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderiomachines	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderiopowertools	5.0.22	EnderIO-1.12.2-5.0.22.jar	None
UCHIJAAAA	enderzoo	1.12.1-1.4.0.49	EnderZoo-1.12.1-1.4.0.49.jar	None
UCHIJAAAA	extrautils2	1.0	extrautils2-1.12-1.7.6.jar	None
UCHIJAAAA	harshencastle	0.13.1	HarshenCastle-0.13.1.jar	None
UCHIJAAAA	waila	1.8.25	Hwyla-1.8.25-B40_1.12.jar	None
UCHIJAAAA	jeibees	0.9.0.5	jeibees-0.9.0.5-mc1.12.2.jar	None
UCHIJAAAA	jepb	1.2.1	jepb-1.12-1.2.1.jar	None
UCHIJAAAA	journeymap	1.12.2-5.5.2	journeymap-1.12.2-5.5.2.jar	None
UCHIJAAAA	magicbees	1.0	MagicBees-1.12.2-3.1.9.jar	None
UCHIJAAAA	nex	2.1.14.15	NetherEx-1.12-2.1.14.15.jar	None
UCHIJAAAA	openmods	0.11.5	OpenModsLib-1.12.2-0.11.5.jar	d2a9a8e8440196e26a268d1f3ddc01b2e9c572a5
UCHIJAAAA	openblocks	1.7.6	OpenBlocks-1.12.2-1.7.6.jar	d2a9a8e8440196e26a268d1f3ddc01b2e9c572a5
UCHIJAAAA	twilightforest	3.6.345	twilightforest-1.12.2-3.6.345-universal.jar	None
UCHIJAAAA	plustic	6.4.0.0	plustic-6.4.0.0.jar	None
UCHIJAAAA	tinkertoolleveling	1.12-1.0.3.DEV.56fac4f	TinkerToolLeveling-1.12-1.0.3.jar	None
UCHIJAAAA	wawla	2.5.253	Wawla-1.12.2-2.5.253.jar	d476d1b22b218a10d845928d1665d45fce301b27

Loaded coremods (and transformers):
EnderCorePlugin (EnderCore-1.12.2-0.5.20.jar)
com.enderio.core.common.transform.EnderCoreTransformer
OpenModsCorePlugin (OpenModsLib-1.12.2-0.11.5.jar)
openmods.core.OpenModsClassTransformer
OpenModsLib class transformers: [llama_null_fix:FINISHED],[horse_base_null_fix:FINISHED],[pre_world_render_hook:ENABLED],[player_render_hook:ENABLED],[horse_null_fix:FINISHED]
Pulsar/tconstruct loaded Pulses:
- TinkerCommons (Enabled/Forced)
- TinkerWorld (Enabled/Not Forced)
- TinkerTools (Enabled/Not Forced)
- TinkerHarvestTools (Enabled/Forced)
- TinkerMeleeWeapons (Enabled/Forced)
- TinkerRangedWeapons (Enabled/Forced)
- TinkerModifiers (Enabled/Forced)
- TinkerSmeltery (Enabled/Not Forced)
- TinkerGadgets (Enabled/Not Forced)
- TinkerOredict (Enabled/Forced)
- TinkerIntegration (Enabled/Forced)
- TinkerFluids (Enabled/Forced)
- TinkerMaterials (Enabled/Forced)
- TinkerModelRegister (Enabled/Forced)
- wailaIntegration (Enabled/Not Forced)

Ender IO: Found the following problem(s) with your installation (That does NOT mean that Ender IO caused the crash or was involved in it in any way. We add this information to help finding common problems, not as an invitation to post any crash you encounter to Ender IO's issue tracker. Always check the stack trace above to see which mod is most likely failing.):
* Offline mode for dedicated servers is NOT supported by Ender IO.
This may (look up the meaning of 'may' in the dictionary if you're not sure what it means) have caused the error. Try reproducing the crash WITHOUT this/these mod(s) before reporting it.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!You are looking at the diagnostics information, not at the crash. !!!
!!!Scroll up until you see the line with '---- Minecraft Crash Report ----'!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Profiler Position: N/A (disabled)
Player Count: 1 / 20; [EntityPlayerMP['player1'/503248, l='world', x=-306.42, y=71.00, z=176.45]]
Is Modded: Definitely; Server brand changed to 'fml,forge'
Type: Dedicated Server (map_server.txt)

What you expected to happen:

Running normally.

Steps to reproduce:

1. The altar is autocrafting slate.
2. Server crashed.

Affected Versions (Do not use "latest"):

• BloodMagic: 1.12.2-2.2.8-91
• Minecraft: 1.12.2
• Forge: 14.23.3.2655

Update Blood Magic