Added support for the new min and max equip level in the SQL item database. (Follow up r16632)

git-svn-id: https://svn.code.sf.net/p/rathena/svn/trunk@16639 54d463be-8e91-2dee-dedb-b68131a5f0ec

sql-files/upgrade_svn16639.sql

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+ALTER TABLE `item_db_re` CHANGE `equip_level` `equip_level` VARCHAR(10);