fix for bug #16401 Events: mysql.event.comment is varchar(64)

missed that one in the previos commit

scripts/mysql_create_system_tables.sh

@@ -791,7 +791,7 @@ then
   c_ev="$c_ev   ends DATETIME default NULL,"
   c_ev="$c_ev   status ENUM('ENABLED','DISABLED') NOT NULL default 'ENABLED',"
   c_ev="$c_ev   on_completion ENUM('DROP','PRESERVE') NOT NULL default 'DROP',"
-  c_ev="$c_ev   comment varchar(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL default '',"
+  c_ev="$c_ev   comment char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL default '',"
   c_ev="$c_ev   PRIMARY KEY  (db,name)"
   c_ev="$c_ev ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COMMENT 'Events';"
 fi