[gnome-initial-setup] gis-assistant: Hide navigation buttons on last page

[Jasper St. Pierre <jstpierre src gnome org>]

commit 6327d0f13856e1e3a8ce71e9542fd165141faef1
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Jul 27 06:20:20 2012 -0300

    gis-assistant: Hide navigation buttons on last page

 gnome-initial-setup/gis-assistant.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/gnome-initial-setup/gis-assistant.c b/gnome-initial-setup/gis-assistant.c
index 738b389..f3822f6 100644
--- a/gnome-initial-setup/gis-assistant.c
+++ b/gnome-initial-setup/gis-assistant.c
@@ -127,14 +127,19 @@ update_navigation_buttons (GisAssistant *assistant,
                            GtkWidget    *page)
 {
   GisAssistantPrivate *priv = assistant->priv;
-  gboolean can_go_backward, can_go_forward;
+  PageData *current_page = priv->current_page;
+  gboolean can_go_backward, can_go_forward, is_last_page;
 
-  can_go_backward = (priv->current_page->link->prev != NULL);
+  can_go_backward = (current_page->link->prev != NULL);
   gtk_widget_set_sensitive (priv->back, can_go_backward);
 
-  can_go_forward = (priv->current_page->link->next != NULL) && gis_assistant_get_page_complete (assistant, page);
+  can_go_forward = gis_assistant_get_page_complete (assistant, page);
   gtk_widget_set_sensitive (priv->forward, can_go_forward);
 
+  is_last_page = (current_page->link->next == NULL);
+  gtk_widget_set_visible (priv->back, !is_last_page);
+  gtk_widget_set_visible (priv->forward, !is_last_page);
+
   if (gis_assistant_get_use_unicode_buttons (assistant, page))
     {
       gtk_button_set_label (GTK_BUTTON (priv->forward), "â");