rem: item = glade_xml_get_widget (totem->xml, "next_stream1");
add: item = glade_xml_get_widget (totem->xml, "next_chapter1");
context: update_buttons (Totem *totem){	GtkWidget *item;	gboolean has_item;	/* Previous */	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_stream1");	gtk_widget_set_sensitive (item, has_item);	/* Next */	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_stream1");	gtk_widget_set_sensitive (item, has_item);}