Fix ItemStack.damage OBFHelper (fixes #1036)

Spigot-Server-Patches/Ability-to-apply-mending-to-XP-API.patch

@@ -52,7 +52,7 @@ index ff5cc74ba..1c59fd966 100644
          return i * 2;
      }
 diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
-index 52cb34abd..45c8e4b1e 100644
+index 52cb34abd..d1ff97a9e 100644
 --- a/src/main/java/net/minecraft/server/ItemStack.java
 +++ b/src/main/java/net/minecraft/server/ItemStack.java
 @@ -0,0 +0,0 @@ public final class ItemStack {
@@ -60,7 +60,7 @@ index 52cb34abd..45c8e4b1e 100644
      private NBTTagCompound tag;
      private boolean g;
 -    private int damage;
-+    private int damage; public void setDamage(int i) { this.damage = 0; } // Paper - OBFHELPER
++    private int damage; public void setDamage(int i) { this.damage = i; } // Paper - OBFHELPER
      private EntityItemFrame i;
      private Block j;
      private boolean k;