[gtk+] gtkheaderbar: update window buttons also on realize

[Alberts Muktupāvels <muktupavels src gnome org>]

commit a90926c7f02390ac7b671bb7ba23fa4cd38d4fdd
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Dec 28 20:46:23 2015 +0200

    gtkheaderbar: update window buttons also on realize
    
    After bb34db6 _gtk_header_bar_update_window_buttons function is
    called before application menu is set. This caused regression -
    app menu button is initially hidden.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756618

 gtk/gtkheaderbar.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index c981468..988bfcf 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -1819,6 +1819,7 @@ gtk_header_bar_realize (GtkWidget *widget)
                             G_CALLBACK (_gtk_header_bar_update_window_buttons), widget);
   g_signal_connect_swapped (settings, "notify::gtk-decoration-layout",
                             G_CALLBACK (_gtk_header_bar_update_window_buttons), widget);
+  _gtk_header_bar_update_window_buttons (GTK_HEADER_BAR (widget));
 }
 
 static void