mob clear effects on death

src/engine/jobs/PersistentAoeJob.java

@@ -45,8 +45,12 @@ public class PersistentAoeJob extends AbstractEffectJob {
         if (this.aej == null || this.source == null || this.action == null || this.power == null || this.source == null || this.eb == null)
             return;
 
-        if (!this.target.isAlive())
+        try {
+            if (!this.target.isAlive())
+                PowersManager.finishEffectTime(this.source, this.target, this.action, this.trains);
+        }catch(Exception e){
             PowersManager.finishEffectTime(this.source, this.target, this.action, this.trains);
+        }
 
         if (!this.source.isAlive())
             PowersManager.finishEffectTime(this.source, this.target, this.action, this.trains);