only set the model on ->priv->cell_view if ->priv->cell_view is non-NULL.

only set the model on ->priv->cell_view if ->priv->cell_view is non-NULL.

Fri Oct  3 20:50:48 2003  Kristian Rietveld  <kris@gtk.org>

	* gtk/gtkcombobox.c (gtk_combo_box_set_model): only set the model
	on ->priv->cell_view if ->priv->cell_view is non-NULL.

	* gtk/gtkcomboboxentry.c: include gtkintl.h, add text_renderer
	field to GtkComboBoxEntryPrivate,
	(gtk_combo_box_entry_class_init), (gtk_combo_box_entry_init),
	(gtk_combo_box_entry_set_property), (gtk_combo_box_entry_get_property),
	(gtk_combo_box_entry_set_text_column), (gtk_combo_box_entry_new): add
	a construct-only "text_column" property and reorder code to use it
	and support inheriting this widget.