libsaria: Remove songs from the library playlist when they are reaped

It's useful to keep the UI in sync with the backend...

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

libsaria/library/update.cpp

@@ -43,6 +43,7 @@ void ValidateTask::run_task()
 		track = &it->get_value();
 		if (!libsaria::exists(track->get_filepath())) {
 			println("Reaping: " + track->get_filepath());
+			lib_playlist.remove_track(&it->get_value());
 			it = path->tracks.erase(it);
 			path->data_state = DIRTY;
 		}