rem: D("gtk_playlist_set_next");
context: gtk_playlist_set_next (GtkPlaylist *playlist){	GtkTreeIter iter;	D("gtk_playlist_set_next");	g_return_if_fail (GTK_IS_PLAYLIST (playlist));	if (gtk_playlist_has_next_mrl (playlist) == FALSE)	{		if (playlist->_priv->repeat == TRUE)			gtk_playlist_set_at_start (playlist);		return;	}	gtk_playlist_unset_playing (playlist);	gtk_tree_model_get_iter (playlist->_priv->model,			&iter,			playlist->_priv->current);	gtk_tree_model_iter_next (playlist->_priv->model, &iter);	gtk_tree_path_free (playlist->_priv->current);	playlist->_priv->current = gtk_tree_model_get_path		(playlist->_priv->model, &iter);}