Player cities write correct offset.

src/engine/gameManager/ZoneManager.java

@@ -476,6 +476,7 @@ public enum ZoneManager {
         worldAlttitude = HeightMap.getWorldHeight(parentZone, zone.getLoc());
 
         // Add zone offset to value
+
         worldAlttitude += zone.getYCoord();
 
         return worldAlttitude;