class and table schema now conform to JSON

src/engine/net/client/handlers/OrderNPCMsgHandler.java

@@ -288,7 +288,7 @@ public class OrderNPCMsgHandler extends AbstractClientMsgHandler {
         if (zone == null)
             return false;
 
-        if (zone.playerCityID == 0)
+        if (zone.playerCityUUID == 0)
             return false;
 
         City city = building.getCity();