add: gtk_dialog_set_has_separator (GTK_DIALOG (error_dialog), FALSE); gtk_container_set_border_width (GTK_CONTAINER (error_dialog), 5);
context: totem_action_info (char *reason, Totem *totem){	GtkWidget *parent, *error_dialog;	if (totem == NULL)		parent = NULL;	else		parent = totem->win;	error_dialog =		gtk_message_dialog_new (GTK_WINDOW (parent),				GTK_DIALOG_MODAL,				GTK_MESSAGE_INFO,				GTK_BUTTONS_OK,				"%s", reason);	gtk_dialog_set_default_response (GTK_DIALOG (error_dialog),			GTK_RESPONSE_OK);	g_signal_connect (G_OBJECT (error_dialog), "destroy", G_CALLBACK			(gtk_widget_destroy), error_dialog);	g_signal_connect (G_OBJECT (error_dialog), "response", G_CALLBACK			(gtk_widget_destroy), error_dialog);	gtk_window_set_modal (GTK_WINDOW (error_dialog), TRUE);	gtk_widget_show (error_dialog);}