Added Enchantgrade to Premium Storage (#5528)

sql-files/upgrades/premium_storage.sql

@@ -33,6 +33,7 @@ CREATE TABLE IF NOT EXISTS `vip_storage` (
   `expire_time` int(11) unsigned NOT NULL default '0',
   `bound` tinyint(3) unsigned NOT NULL default '0',
   `unique_id` bigint(20) unsigned NOT NULL default '0',
+  `enchantgrade` tinyint unsigned NOT NULL default '0',
   PRIMARY KEY  (`id`),
   KEY `account_id` (`account_id`)
 ) ENGINE=MyISAM;