[gnome-control-center] shell: Fix gtk_tree_model_get_iter_first() retval

[Bastien Nocera <hadess src gnome org>]

commit 3ff7c61db17d8f078719b2861fae0707eaf1048e
Author: Bastien Nocera <hadess hadess net>
Date:   Tue May 26 13:22:20 2015 +0200

    shell: Fix gtk_tree_model_get_iter_first() retval
    
    https://bugzilla.gnome.org/show_bug.cgi?id=749892

 shell/cc-window.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/shell/cc-window.c b/shell/cc-window.c
index 6d9fd6b..ce2061a 100644
--- a/shell/cc-window.c
+++ b/shell/cc-window.c
@@ -429,7 +429,7 @@ categories_keynav_failed (GtkIconView      *current_view,
           sel = NULL;
           dist = 1000;
           model = gtk_icon_view_get_model (new_view);
-          gtk_tree_model_get_iter_first (model, &iter);
+          g_assert (gtk_tree_model_get_iter_first (model, &iter));
           do {
             path = gtk_tree_model_get_path (model, &iter);
             c = gtk_icon_view_get_item_column (new_view, path);
@@ -466,7 +466,7 @@ categories_keynav_failed (GtkIconView      *current_view,
           sel = NULL;
           dist = 1000;
           model = gtk_icon_view_get_model (new_view);
-          gtk_tree_model_get_iter_first (model, &iter);
+          g_assert (gtk_tree_model_get_iter_first (model, &iter));
           do {
             path = gtk_tree_model_get_path (model, &iter);
             c = gtk_icon_view_get_item_column (new_view, path);