invisible cities on map logging

src/engine/objects/City.java

@@ -295,7 +295,11 @@ public class City extends AbstractWorldObject {
             else
                 writer.putString(rulingNation.getName());
 
+            if(city.getTOL() != null) {
                 writer.putInt(city.getTOL().getRank());
+            }else{
+                writer.putInt(-1);
+            }
 
             if (city.isNoobIsle > 0)
                 writer.putInt(1);