[glade/headerbar] Add a placeholder to windows initially

[Matthias Clasen <matthiasc src gnome org>]

commit 42e307a120cf926a247d3e34037343a7c5a66449
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Oct 16 23:03:26 2014 -0400

    Add a placeholder to windows initially

 plugins/gtk+/glade-gtk-window.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/plugins/gtk+/glade-gtk-window.c b/plugins/gtk+/glade-gtk-window.c
index cac2764..b4ae523 100644
--- a/plugins/gtk+/glade-gtk-window.c
+++ b/plugins/gtk+/glade-gtk-window.c
@@ -71,6 +71,11 @@ glade_gtk_window_post_create (GladeWidgetAdaptor * adaptor,
                         G_CALLBACK (glade_gtk_window_parse_finished),
                         object);
     }
+  else if (reason == GLADE_CREATE_USER)
+    {
+      gtk_container_add (GTK_CONTAINER (object), glade_placeholder_new ());
+    }
+
 }
 
 static void