rem: GtkWidget *widget;
context: update_seekable (Totem *totem, gboolean seekable){	GtkWidget *widget;	if (totem->seekable == seekable)		return;	totem->seekable = seekable;	/* Check if the stream is seekable */	gtk_widget_set_sensitive (totem->seek, seekable);	gtk_widget_set_sensitive (totem->fs_seek, seekable);	totem_main_set_sensitivity ("tmw_seek_hbox", seekable);	totem_main_set_sensitivity ("tcw_time_hbox", seekable);	totem_main_set_sensitivity ("tmw_skip_forward_menu_item", seekable);	totem_main_set_sensitivity ("tmw_skip_backwards_menu_item", seekable);	totem_popup_set_sensitivity ("trcm_skip_forward", seekable);	totem_popup_set_sensitivity ("trcm_skip_backwards", seekable);	totem_main_set_sensitivity ("tmw_skip_to_menu_item", seekable);	if (totem->skipto)		totem_skipto_set_seekable (totem->skipto, seekable);}