[gtk+] GtkSidebar: Don't use internal API

[Matthias Clasen <matthiasc src gnome org>]

commit 8495c0c7adcc3b38f6d4b43929c42ba0c4eaf13f
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 2 22:01:14 2014 -0400

    GtkSidebar: Don't use internal API
    
    This makes it possible to copy the gtksidebar.c source into
    other projects, for early adopters.

 gtk/gtksidebar.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtksidebar.c b/gtk/gtksidebar.c
index 707694a..437f692 100644
--- a/gtk/gtksidebar.c
+++ b/gtk/gtksidebar.c
@@ -192,8 +192,7 @@ gtk_sidebar_init (GtkSidebar *sidebar)
                                   GTK_POLICY_NEVER,
                                   GTK_POLICY_AUTOMATIC);
 
-  _gtk_bin_set_child (GTK_BIN (sidebar), sw);
-  gtk_widget_set_parent (sw, GTK_WIDGET (sidebar));
+  gtk_container_add (GTK_CONTAINER (sidebar), sw);
 
   priv->list = GTK_LIST_BOX (gtk_list_box_new ());
   gtk_widget_show (GTK_WIDGET (priv->list));