databse update for stacked resources

src/engine/net/client/ClientMessagePump.java

@@ -1464,7 +1464,7 @@ public class ClientMessagePump implements NetMsgHandler {
                                 ChatManager.chatSystemError(sourcePlayer, "Failed To Buy Item");
                                 return;
                             }
-                            if(me.getItemBase().getType().equals(ItemType.RESOURCE)){
+                            if(me.getItemBase().getType().equals(ItemType.RESOURCE) && npc.getContractID() == 900){
                                 boolean stacked = false;
                                 for(Item item : itemMan.getInventory()){
                                     int itemID = item.getItemBaseID();