[Bleeding] Fix witches dropping empty ItemStacks on death. Fixes BUKKIT-3554

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

@@ -142,8 +142,10 @@ public class EntityWitch extends EntityMonster implements IRangedEntity {
                 l += this.random.nextInt(i + 1);
             }
 
+            if (l > 0) {
                 loot.add(new org.bukkit.inventory.ItemStack(org.bukkit.craftbukkit.util.CraftMagicNumbers.getMaterial(item), l));
             }
+        }
 
         org.bukkit.craftbukkit.event.CraftEventFactory.callEntityDeathEvent(this, loot);
         // CraftBukkit end