Update Item.kt

Oops forgot to set the damage and use LivingEntity instead and player(stack) as default.

src/main/kotlin/com/enginemachiner/harmony/Item.kt

@@ -147,9 +147,9 @@ private interface HarmonyItem {
     fun player( stack: ItemStack ): PlayerEntity { return stack.holder as PlayerEntity }
 
     /** Damage the stack. */
-    fun damage( stack: ItemStack, player: PlayerEntity, damage: Int = 1 ) {
+    fun damage( stack: ItemStack, entity: LivingEntity = player(stack), damage: Int = 1 ) {
 
-        stack.damage(1, player) { breakEquipment(it, stack) }
+        stack.damage( damage, entity ) { breakEquipment(entity, stack) }
 
     }