[gtk+] a11y: Set proper role for GtkHeaderBar

[Alejandro Piñeiro Iglesias <apinheiro src gnome org>]

commit 94d52f99f839bd2e2812fec8598f06bf17f8f7d0
Author: Alejandro Piñeiro <apinheiro igalia com>
Date:   Thu Sep 12 15:36:10 2013 +0200

    a11y: Set proper role for GtkHeaderBar
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707981

 gtk/gtkheaderbar.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkheaderbar.c b/gtk/gtkheaderbar.c
index a69f5a0..400f34a 100644
--- a/gtk/gtkheaderbar.c
+++ b/gtk/gtkheaderbar.c
@@ -1457,7 +1457,7 @@ gtk_header_bar_class_init (GtkHeaderBarClass *class)
                                                          FALSE,
                                                          GTK_PARAM_READWRITE));
 
-  gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_FILLER);
+  gtk_widget_class_set_accessible_role (widget_class, ATK_ROLE_PANEL);
 }
 
 static void