[gnome-control-center] region: remove helper function not needed since GTK+ 3.0

[Sergey V. Udaltsov <svu src gnome org>]

commit 60a25073668b8d8e571dd68ca2d34c9c1a7483ee
Author: Rui Matos <tiagomatos gmail com>
Date:   Sun Jun 12 01:12:20 2011 +0100

    region: remove helper function not needed since GTK+ 3.0
    
    GTK+ 3.0 introduced gtk_tree_model_iter_previous() so we no longer need to
    keep this helper function.
    
    Also, simplify the use of GtkTreeIters by allocating them on the stack.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=652374

 panels/region/gnome-region-panel-xkblt.c |   38 ++++++-----------------------
 1 files changed, 8 insertions(+), 30 deletions(-)
---
diff --git a/panels/region/gnome-region-panel-xkblt.c b/panels/region/gnome-region-panel-xkblt.c
index 7737dda..21574b3 100644
--- a/panels/region/gnome-region-panel-xkblt.c
+++ b/panels/region/gnome-region-panel-xkblt.c
@@ -374,39 +374,20 @@ remove_selected_layout (GtkWidget * button, GtkBuilder * dialog)
 	update_layouts_list (model, dialog);
 }
 
-static gboolean
-_tree_model_iter_previous (GtkTreeModel *tree_model,
-			   GtkTreeIter *iter)
-{
-	GtkTreePath *path;
-	gboolean ret;
-
-	path = gtk_tree_model_get_path (tree_model, iter);
-	ret = gtk_tree_path_prev (path);
-	if (ret != FALSE)
-		gtk_tree_model_get_iter (tree_model, iter, path);
-
-	gtk_tree_path_free (path);
-	return ret;
-}
-
 static void
 move_up_selected_layout (GtkWidget * button, GtkBuilder * dialog)
 {
 	GtkTreeModel *model;
-	GtkTreeIter iter, *prev;
+	GtkTreeIter iter, prev;
 
 	if (get_selected_iter (dialog, &model, &iter) == FALSE)
 		return;
 
-	prev = gtk_tree_iter_copy (&iter);
-	if (!_tree_model_iter_previous (model, prev)) {
-		gtk_tree_iter_free (prev);
+	prev = iter;
+	if (!gtk_tree_model_iter_previous (model, &prev))
 		return;
-	}
 
-	gtk_list_store_swap (GTK_LIST_STORE (model), &iter, prev);
-	gtk_tree_iter_free (prev);
+	gtk_list_store_swap (GTK_LIST_STORE (model), &iter, &prev);
 
 	update_layouts_list (model, dialog);
 }
@@ -415,19 +396,16 @@ static void
 move_down_selected_layout (GtkWidget * button, GtkBuilder * dialog)
 {
 	GtkTreeModel *model;
-	GtkTreeIter iter, *next;
+	GtkTreeIter iter, next;
 
 	if (get_selected_iter (dialog, &model, &iter) == FALSE)
 		return;
 
-	next = gtk_tree_iter_copy (&iter);
-	if (!gtk_tree_model_iter_next (model, next)) {
-		gtk_tree_iter_free (next);
+	next = iter;
+	if (!gtk_tree_model_iter_next (model, &next))
 		return;
-	}
 
-	gtk_list_store_swap (GTK_LIST_STORE (model), &iter, next);
-	gtk_tree_iter_free (next);
+	gtk_list_store_swap (GTK_LIST_STORE (model), &iter, &next);
 
 	update_layouts_list (model, dialog);
 }