[gtk/ebassi/for-master: 9/14] a11y: Do not leak the ATContext in GtkStackPage

[Emmanuele Bassi <ebassi src gnome org>]

commit 73b14a3c3a980be4a8860532914a16fb61cc410b
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Nov 11 18:08:16 2020 +0000

    a11y: Do not leak the ATContext in GtkStackPage
    
    GtkStackPage is not a widget, so it must release the reference on the
    ATContext it owns.

 gtk/gtkstack.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtk/gtkstack.c b/gtk/gtkstack.c
index bb6ecfeb12..3d70475ff9 100644
--- a/gtk/gtkstack.c
+++ b/gtk/gtkstack.c
@@ -274,6 +274,8 @@ gtk_stack_page_finalize (GObject *object)
     g_object_remove_weak_pointer (G_OBJECT (page->last_focus),
                                   (gpointer *)&page->last_focus);
 
+  g_clear_object (&page->at_context);
+
   G_OBJECT_CLASS (gtk_stack_page_parent_class)->finalize (object);
 }