add: playlist->_priv->nb_childs++;
context: totem_playlist_add_one_mrl (TotemPlaylist *playlist, const char *mrl,		const char *display_name){	GtkListStore *store;	GtkTreeIter iter;	char *filename_for_display;	g_return_val_if_fail (GTK_IS_PLAYLIST (playlist), FALSE);	g_return_val_if_fail (mrl != NULL, FALSE);	if (display_name == NULL)	{		filename_for_display = totem_playlist_mrl_to_title (mrl);	} else {		filename_for_display = g_strdup (display_name);	}	D("totem_playlist_add_one_mrl (): %s %s %s\n",				filename_for_display, mrl, display_name);	store = GTK_LIST_STORE (playlist->_priv->model);	gtk_list_store_append (store, &iter);	gtk_list_store_set (store, &iter,			PIX_COL, NULL,			FILENAME_COL, filename_for_display,			URI_COL, mrl,			TITLE_CUSTOM_COL, display_name ? TRUE : FALSE,			-1);	g_free (filename_for_display);	if (playlist->_priv->current == NULL)		playlist->_priv->current = gtk_tree_model_get_path			(playlist->_priv->model, &iter);	g_signal_emit (G_OBJECT (playlist),			totem_playlist_table_signals[CHANGED], 0,			NULL);	return TRUE;}