Fix some bugs related to loading tilesets.

git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@1003 ed5b42cb-e716-0410-a449-f6a68f950b19

src/as/com/threerings/media/tile/DataPackTileSetRepository.as

@@ -144,7 +144,6 @@ public class DataPackTileSetRepository
 
         var completeListener :Function = function () :void {
             tileSet.setImageProvider(_packs.get(packName));
-            tileSet.loaded();
         };
 
         var listeners :Array = _packListeners.get(packName);

src/as/com/threerings/media/tile/TileSet.as

@@ -67,6 +67,8 @@ public /* abstract */ class TileSet
             }
         }
         _pending = [];
+
+        loaded();
     }
 
     /**