invisible cities on map logging

src/engine/objects/City.java

@@ -199,6 +199,7 @@ public class City extends AbstractWorldObject {
     }
 
     public static void serializeForClientMsg(City city, ByteBufferWriter writer) {
+        try {
             AbstractCharacter guildRuler;
             Guild rulingGuild;
             Guild rulingNation;
@@ -328,6 +329,9 @@ public class City extends AbstractWorldObject {
             writer.put((byte) 0);
             writer.put((byte) 0);
             writer.put((byte) 0);
+        }catch(Exception e){
+            Logger.error(city.getObjectUUID() + " failed ot serialize because: " + e.getMessage());
+        }
     }
 
     public static Vector3fImmutable getBindLoc(int cityID) {