libsaria: Send a PLAYLIST_CHANGED notification when loading

To tell the UI what gui settings need to be changed.

Signed-off-by: Bryan Schumaker <bjschuma@gmail.com>

libsaria/playlist/file.cpp

@@ -73,6 +73,7 @@ namespace libsaria
 			flags |= PL_SORTED;
 			do_sort();
 		}
+		notify(PLAYLIST_CHANGED, this);
 	}
 
 	void Playlist::save(ofstream &stream)