And a convenience function for the client, too.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@820 c613c5cb-e716-0410-b11b-feb51c14d237

src/as/com/threerings/parlor/game/client/GameController.as

@@ -177,6 +177,14 @@ public /*abstract*/ class GameController extends PlaceController
         return (_userIder == null) ? 0 : _userIder.getUserId(name);
     }
 
+    /**
+     * Returns the persistent user id for the supplied occupant info.
+     */
+    public function getPlayerPersistentId (occInfo :OccupantInfo) :int
+    {
+        return getPlayerPersistentId(occInfo.username);
+    }
+
     /**
      * Returns the unique identifier for the current gameplay session.
      */