[gtk+] widget: fix GtkLabelAccessible NULL links.

[Matthias Clasen <matthiasc src gnome org>]

commit cd305c19702cc80f900a0922bce19bf0c926167a
Author: Alban Browaeys <prahal yahoo com>
Date:   Sat May 14 23:57:28 2016 +0200

    widget: fix GtkLabelAccessible NULL links.
    
    Fix testsuite/a11y/about.ui GtkAboutDialog :
    "CRITICAL **: atk_hyperlink_get_start_index: assertion 'ATK_IS_HYPERLINK (link)' failed"
    That is set widget->priv->accessible as soon as accessible object is generated.
    
    When accessible object is created accessible->priv->widget is set,
    if widget->priv->accessible is not , then _gtk_label_accessible_update_links
    exits early, thus without creating the links on the accessible side.
    (This as it checks for the widget to have the accessible set before proceeding).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766458

 gtk/gtkwidget.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index c14e127..36752b4 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -13417,6 +13417,8 @@ gtk_widget_real_get_accessible (GtkWidget *widget)
 
           if (priv->accessible_role != ATK_ROLE_INVALID)
             atk_object_set_role (accessible, priv->accessible_role);
+
+          widget->priv->accessible = accessible;
         }
       else
         {
@@ -13426,6 +13428,8 @@ gtk_widget_real_get_accessible (GtkWidget *widget)
           if (priv->accessible_role != ATK_ROLE_INVALID)
             atk_object_set_role (accessible, priv->accessible_role);
 
+          widget->priv->accessible = accessible;
+
           atk_object_initialize (accessible, widget);
 
           /* Set the role again, since we don't want a role set
@@ -13436,7 +13440,6 @@ gtk_widget_real_get_accessible (GtkWidget *widget)
             atk_object_set_role (accessible, priv->accessible_role);
         }
 
-      widget->priv->accessible = accessible;
     }
 
   return accessible;