rem: if (totem_playing_dvd (totem))
add: if (totem_playing_dvd (totem) == TRUE) {
context: update_buttons (Totem *totem){	GtkWidget *item;	gboolean has_item;	/* Previous */        /* FIXME Need way to detect if DVD Title is at first chapter */        if (totem_playing_dvd (totem))                has_item = TRUE;        else                has_item = gtk_playlist_has_previous_mrl (totem->playlist);	item = glade_xml_get_widget (totem->xml, "previous_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "fs_previous_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "previous_chapter1");	gtk_widget_set_sensitive (item, has_item);	/* Next */        /* FIXME Need way to detect if DVD Title has no more chapters */        if (totem_playing_dvd (totem))                has_item = TRUE;        else		has_item = gtk_playlist_has_next_mrl (totem->playlist);	item = glade_xml_get_widget (totem->xml, "next_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "fs_next_button");	gtk_widget_set_sensitive (item, has_item);	item = glade_xml_get_widget (totem->xml, "next_chapter1");	gtk_widget_set_sensitive (item, has_item);}