Update last chunk position in findSupportingBlock

Fixes fetching chunks needlessly multiple times.

Thanks Lulu13022002 for pointing this out

src/main/java/ca/spottedleaf/moonrise/mixin/collisions/LevelMixin.java

@@ -391,6 +391,8 @@ public abstract class LevelMixin implements CollisionLevel, LevelAccessor, AutoC
                 final int newChunkZ = currZ >> 4;
 
                 if (((newChunkX ^ lastChunkX) | (newChunkZ ^ lastChunkZ)) != 0) {
+                    lastChunkX = newChunkX;
+                    lastChunkZ = newChunkZ;
                     lastChunk = (LevelChunk)chunkSource.getChunk(newChunkX, newChunkZ, ChunkStatus.FULL, false);
                 }
 

src/main/java/ca/spottedleaf/moonrise/mixin/farm_block/FarmBlockMixin.java

@@ -17,7 +17,7 @@ import org.spongepowered.asm.mixin.Overwrite;
 public abstract class FarmBlockMixin {
 
     /**
-     * @reason Avoid usage of betweenClsed, this can become very hot when
+     * @reason Avoid usage of betweenClosed, this can become very hot when
      *         there are significant numbers of farm blocks in the world
      * @author Spottedleaf
      */