[gnome-control-center] region: Make the code more robust

[Matthias Clasen <matthiasc src gnome org>]

commit 0af48c80a95f9ca6ceca0b1b65e0a17b96fcb4f3
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 19 21:34:18 2012 -0400

    region: Make the code more robust
    
    update_ibus_active_sources may very well be called with
    an empty treeview. The code that iterates over the model
    was assuming that there is at least one item. Fix that
    by checking the return value of gtk_tree_model_get_iter_first().

 panels/region/gnome-region-panel-input.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/panels/region/gnome-region-panel-input.c b/panels/region/gnome-region-panel-input.c
index 9630bec..a8ff912 100644
--- a/panels/region/gnome-region-panel-input.c
+++ b/panels/region/gnome-region-panel-input.c
@@ -126,12 +126,13 @@ update_ibus_active_sources (GtkBuilder *builder)
   GtkTreeModel *model;
   GtkTreeIter iter;
   gchar *type, *id;
+  gboolean ret;
 
   tv = GTK_TREE_VIEW (WID ("active_input_sources"));
   model = gtk_tree_view_get_model (tv);
 
-  gtk_tree_model_get_iter_first (model, &iter);
-  do
+  ret = gtk_tree_model_get_iter_first (model, &iter);
+  while (ret)
     {
       gtk_tree_model_get (model, &iter,
                           TYPE_COLUMN, &type,
@@ -157,8 +158,9 @@ update_ibus_active_sources (GtkBuilder *builder)
 
       g_free (type);
       g_free (id);
+
+      ret = gtk_tree_model_iter_next (model, &iter);
     }
-  while (gtk_tree_model_iter_next (model, &iter));
 }
 
 static void