Fix #68938.

Fix #68938.

2004-02-03  Federico Mena Quintero  <federico@ximian.com>

	Fix #68938.

	* gtk/gtkdialog.c (GtkDialogPrivate): New private structure for
	GtkDialog; right now it only contains an ignore_separator field.
	(gtk_dialog_class_init): Register the private structure.
	(gtk_dialog_init): Initialize the priv->ignore_separator field.
	(_gtk_dialog_set_ignore_separator): New private function.
	(gtk_dialog_set_has_separator): Ignore the setting if appropriate.

	* gtk/gtkmessagedialog.c (gtk_message_dialog_class_init): Add a
	use_separator style property.
	(gtk_message_dialog_style_set): Change the dialog's separator
	based on the style property.
	(gtk_message_dialog_init): Set the dialog box to ignore the
	separator setting.