zerg mechanic work

src/engine/objects/Mine.java

@@ -582,7 +582,7 @@ public class Mine extends AbstractGameObject {
 
         if(isAc) {
             Thread zergMechanicThread = new Thread(new ZergMechanicThread(null, this));
-            zergMechanicThread.setName(this.zoneName + "Mine");
+            zergMechanicThread.setName(this.parentZone.getName() + "Mine");
             zergMechanicThread.start();
         }
     }