resources auto stack when entering inventory

src/engine/objects/CharacterItemManager.java

@@ -1251,6 +1251,27 @@ public class CharacterItemManager {
         ItemBase ib = i.getItemBase();
         if (ib != null)
             this.inventoryWeight += ib.getWeight();
+
+        if (i.getItemBase().getType().equals(ItemType.RESOURCE) && this.getOwner().getObjectType().equals(GameObjectType.PlayerCharacter)) {
+            int count = i.getNumOfItems();
+            ArrayList<Item> purge = new ArrayList<>();
+            for (Item it : this.getInventory()) {
+                if (it.getItemBase().equals(i.getItemBase()) && it.getNumOfItems() + i.getNumOfItems() <= Warehouse.getMaxResources().get(it.getItemBaseID())) {
+                    purge.add(it);
+                    count += it.getNumOfItems();
+                }
+            }
+            if (count <= Warehouse.getMaxResources().get(i.getItemBaseID())) {
+                MobLoot ml = new MobLoot(this.getOwner(), i.getItemBase(), count, false);
+                for (Item p : purge) {
+                    this.removeItemFromInventory(p);
+                }
+                this.addItemToInventory(ml.promoteToItem((PlayerCharacter) this.getOwner()), 1);
+                this.updateInventory();
+                return true;
+            }
+        }
+
         return true;
     }