Add a brief method for getting our id.

git-svn-id: svn+ssh://src.earth.threerings.net/vilya/trunk@827 c613c5cb-e716-0410-b11b-feb51c14d237

src/java/com/threerings/parlor/game/server/GameManager.java

@@ -84,6 +84,14 @@ public class GameManager extends PlaceManager
         return _gameconfig;
     }
 
+    /**
+     * Returns the unique numeric identifier for our managed game. See {@link GameConfig#getGameId}.
+     */
+    public int getGameId ()
+    {
+        return getGameConfig().getGameId();
+    }
+
     /**
      * A convenience method for getting the game type.
      */