class and table schema now conform to JSON

src/engine/objects/Building.java

@@ -460,10 +460,10 @@ public class Building extends AbstractWorldObject {
                 }
             }
         }
-        if (this.parentZone.isPlayerCity == false)
+        if (this.parentZone.isGuildZone == false)
             return null;
 
-        return City.getCity(this.parentZone.playerCityID);
+        return City.getCity(this.parentZone.playerCityUUID);
 
     }