trebs slot in proper locations

src/engine/gameManager/NPCManager.java

@@ -344,16 +344,15 @@ public enum NPCManager {
         else {
             if(abstractCharacter.getObjectType().equals(Enum.GameObjectType.Mob) && ((Mob)abstractCharacter).behaviourType.equals(Enum.MobBehaviourType.SiegeEngine)) {
                 Mob mob = (Mob)abstractCharacter;
-                buildingSlot = mob.guardCaptain.siegeMinionMap.size() + 1;
-            }else {
+                buildingSlot = mob.guardCaptain.siegeMinionMap.size() + 2;
+            }else
                 buildingSlot = BuildingManager.getAvailableSlot(abstractCharacter.building);
         }
-        }
         if (buildingSlot == -1)
             Logger.error("No available slot for NPC: " + abstractCharacter.getObjectUUID());
 
         // Pets are regular mobiles not hirelings (Siege engines)
-
+        if(abstractCharacter.contract != null)
             abstractCharacter.building.getHirelings().put(abstractCharacter, buildingSlot);
 
         // Override bind and location for  this npc derived