Validation work

src/engine/gameManager/ForgeManager.java

@@ -149,7 +149,11 @@ public enum ForgeManager implements Runnable {
             return false;
         }
 
-        // use Warehouse.caclulateOverdraft(workorder) method
+        if (calcCostOverflow(workOrder).isEmpty() == false) {
+            if (playerCharacter != null)
+                ErrorPopupMsg.sendErrorPopup(playerCharacter, 18);      //18: You can't really afford that
+            return false;
+        }
 
         return true;
     }
@@ -220,7 +224,7 @@ public enum ForgeManager implements Runnable {
         return production_cost;
     }
 
-    public static HashMap<mbEnums.ResourceType, Integer> calculateCostOverflow(WorkOrder workOrder) {
+    public static HashMap<mbEnums.ResourceType, Integer> calcCostOverflow(WorkOrder workOrder) {
 
         HashMap<mbEnums.ResourceType, Integer> costMap = new HashMap<>();
         Warehouse warehouse;