Always consume bonemeal when used on a sapling. Fixes BUKKIT-3755

In Minecraft 1.5 saplings do not grow with a single use of bonemeal anymore.
Our code assumes they will and only takes away bonemeal from the player
when the tree grows successfully (not cancelled by a plugin). Instead we
now always remove a bonemeal even if a plugin is the reason a tree didn't
grow as this matches the vanilla logic more closely.

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

@@ -116,7 +116,11 @@ public class BlockSapling extends BlockFlower {
                     --itemstack.count;
                 }
             }
+        } else if (bonemeal && itemstack != null) {
+            // We always consume bonemeal when trying to grow
+            --itemstack.count;
         }
+
         if (!grownTree) {
             if (flag) {
                 world.setTypeIdAndData(i + i1, j, k + j1, this.id, l, 4);

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

@@ -95,11 +95,11 @@ public class ItemDye extends Item {
                 if ((double) world.random.nextFloat() < 0.45D) {
                     // CraftBukkit start
                     Player player = (entityhuman instanceof EntityPlayer) ? (Player) entityhuman.getBukkitEntity() : null;
-                    ((BlockSapling) Block.SAPLING).grow(world, i, j, k, world.random, true, player, itemstack);
+                    ((BlockSapling) Block.SAPLING).grow(world, i, j, k, world.random, true, player, null);
+                    // CraftBukkit end
                 }
 
-                // --itemstack.count; - called later if the bonemeal attempt was succesful
+                --itemstack.count;
-                // CraftBukkit end
             }
 
             return true;
@@ -194,7 +194,7 @@ public class ItemDye extends Item {
                         ((BlockMushroom) Block.byId[l]).grow(world, i, j, k, world.random, true, player, itemstack);
                 }
 
-                //--itemstack.count; - called later if the bonemeal attempt was succesful
+                //--itemstack.count; - called later if the bonemeal attempt was not cancelled by a plugin
                 // CraftBukkit end
             }
 

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

@@ -26,7 +26,6 @@ public class ItemSnow extends ItemBlockWithAuxData {
                 }
                 /*
                 if (k1 <= 6 && world.b(block.b(world, i, j, k)) && world.setData(i, j, k, k1 + 1 | j1 & -8, 2)) {
-                    // CraftBukkit end
                     world.makeSound((double) ((float) i + 0.5F), (double) ((float) j + 0.5F), (double) ((float) k + 0.5F), block.stepSound.getPlaceSound(), (block.stepSound.getVolume1() + 1.0F) / 2.0F, block.stepSound.getVolume2() * 0.8F);
                     --itemstack.count;
                     return true;