Fix typo in characters.sql - Spotted by Tux

--HG--
branch : trunk

sql/characters.sql

@@ -55,6 +55,7 @@ CREATE TABLE `arena_team_member` (
   `played_season` int(10) unsigned NOT NULL default '0',
   `wons_season` int(10) unsigned NOT NULL default '0',
   `personal_rating` int(10) UNSIGNED NOT NULL DEFAULT '0',
+  PRIMARY KEY  (`arenateamid`,`guid`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
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