Prevent Tinkers Construct worldgen in the CM dimension

This probably also applies to some other mods like Ice and Fire.
Thanks to reddit /r/feedthebeast for reporting the bug and providing
the fix.

Author: davenonymous

src/main/java/org/dave/compactmachines3/world/ChunkGeneratorMachines.java

@@ -29,6 +29,7 @@ public Chunk generateChunk(int x, int z) {
         Chunk chunk = new Chunk(this.world, cp, x, z);
         chunk.generateSkylightMap();
         chunk.setBiomeArray(voidBiomeArray);
+        chunk.setTerrainPopulated(true);
         return chunk;
     }