fix casting form mob hates

src/engine/gameManager/PowersManager.java

@@ -1180,12 +1180,14 @@ public enum PowersManager {
         HashSet<AbstractWorldObject> mobs = WorldGrid.getObjectsInRangePartial(playerCharacter.loc,60.0f,MBServerStatics.MASK_MOB);
         for(AbstractWorldObject awo : mobs){
             Mob mobTarget = (Mob)awo;
+            if(mobTarget.hate_values != null) {
                 if (mobTarget.hate_values.containsKey(playerCharacter)) {
                     mobTarget.hate_values.put(playerCharacter, mobTarget.hate_values.get(playerCharacter) + pb.getHateValue(trains));
                 } else {
                     mobTarget.hate_values.put(playerCharacter, pb.getHateValue(trains));
                 }
             }
+        }
 
     }