Workorders cleared with hireling removal.

src/engine/mobileAI/MobAI.java

@@ -432,7 +432,7 @@ public class MobAI {
 
             ChatManager.chatSayInfo(null, mob.getName() + " calls for help!");
 
-            Zone mobCamp = mob.getParentZone();
+            Zone mobCamp = mob.parentZone;
 
             for (Mob helper : mobCamp.zoneMobSet) {
                 if (helper.behaviourType.respondsToCallForHelp && helper.behaviourType.BehaviourHelperType.equals(mob.behaviourType)) {