Issue Description:

Opening Search tab in Creative Mode Inventory crashes the game

Steps to reproduce:

1. /gamemode c
2. Open inventory
3. Click the compass to get to search gab
   ...

Affected Versions (Do not use "latest"):

• EnderIO: 1.9.4-3.0.0.37_alpha
  • EnderCorePlugin (EnderCore-1.9.4-0.4.0.23-alpha.jar)
• Minecraft: 1.9.4
• Forge: FML: MCP 9.28 Powered by Forge 12.17.0.1954

Your most recent log file where the issue was present:

ava.lang.NullPointerException: Updating screen events
at crazypants.enderio.capacitor.CapacitorHelper.addCapData(CapacitorHelper.java:69)
at crazypants.enderio.material.ItemCapacitor.func_150895_a(ItemCapacitor.java:69)
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147053_i(GuiContainerCreative.java:342)
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_147050_b(GuiContainerCreative.java:523)
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146286_b(GuiContainerCreative.java:427)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:550)
at net.minecraft.client.gui.inventory.GuiContainerCreative.func_146274_d(GuiContainerCreative.java:539)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:509)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1699)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1056)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:369)
at net.minecraft.client.main.Main.main(SourceFile:124)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

This doesn't happen with EIO 3.0.0.36 so it might be a bug in the Specialty Capacitors to Loot Tables commit

Sooo....is this getting fixed?

This also happens when you click the EnderIO Tab in the creative inventory.

Past me: it is: #3372

oops, seems I forgot to link the main one in here. sry