Fixed bonemeal not being consumed on failed growth attempts. This fixes BUKKIT-337. Thanks to md-5 for the pull request!

src/main/java/net/minecraft/server/WorldGenTrees.java

@@ -124,9 +124,6 @@ public class WorldGenTrees extends WorldGenerator {
                             for (BlockState state : event.getBlocks()) {
                                 state.update(true);
                             }
-                            if (event.isFromBonemeal() && itemstack != null) {
-                                --itemstack.count;
-                            }
                         }
                     }
                     // Craftbukkit end