class and table schema now conform to JSON

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

@@ -75,7 +75,7 @@ public class ManageCityAssetMsgHandler extends AbstractClientMsgHandler {
 
                 Zone zone = ZoneManager.findSmallestZone(player.getLoc());
 
-                if (!zone.isGuildZone) {
+                if (!zone.guild_zone) {
                     ErrorPopupMsg.sendErrorMsg(player, "Unable to find city to command.");
                     return true;
                 }