fix casting form mob hates

src/engine/gameManager/PowersManager.java

@@ -1180,10 +1180,12 @@ 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.containsKey(playerCharacter)){
-                mobTarget.hate_values.put(playerCharacter,mobTarget.hate_values.get(playerCharacter) + pb.getHateValue(trains));
-            }else{
-                mobTarget.hate_values.put(playerCharacter, pb.getHateValue(trains));
+            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));
+                }
             }
         }