Affected Mod Versions:

• Forge version: forge-1.10.2-12.18.1.2094-universal
• RTG version: 4.1.1.2-snapshot-8
• BOP version: 5.0.0.2085-universal

Issue Description:

Server crashes with error message given below, when Patch Biome ID is set to -1, and starts fine when it's set to 1.

Expected behavior: Server should not crash when Patch Biome ID is set to -1.

Steps to reproduce the issue:

1. Set I:"Patch Biome ID"=-1
2. Start the server.

Extra Information:

Description: Exception in server tick loop

java.lang.RuntimeException: NULL biome (8) found when setting up beaches for biomes.
at rtg.world.biome.realistic.RealisticBiomePatcher.getPatchedRealisticBiome(RealisticBiomePatcher.java:38)
at rtg.world.biome.BiomeAnalyzer.setupBeachesForBiomes(BiomeAnalyzer.java:286)
at rtg.world.biome.BiomeAnalyzer.(BiomeAnalyzer.java:40)
at rtg.world.gen.ChunkProviderRTG.(ChunkProviderRTG.java:66)
at rtg.world.WorldTypeRTG.getChunkGenerator(WorldTypeRTG.java:50)
at net.minecraft.world.WorldProvider.func_186060_c(WorldProvider.java:61)
at net.minecraft.world.WorldServer.func_72970_h(WorldServer.java:854)
at net.minecraft.world.WorldServer.(WorldServer.java:115)
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:252)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:266)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:431)
at java.lang.Thread.run(Thread.java:745)

Full Crashlog:
https://gist.github.com/mankra/cf41b247c1ee0245db28d60e2b3742a4

Fixed in 3d77960

@mankra Here's the fixed version if you want to carry on testing: RTG-1.10.2-4.1.1.2-prerelease-1.jar