[gtk/wip/ebassi/a11y-2] spinbuttonaccessible: Fix an oversight

[Matthias Clasen <matthiasc src gnome org>]

commit be6bcf882deadbcc20d5c62aae8b793f684f1837
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jun 5 17:21:26 2020 -0400

    spinbuttonaccessible: Fix an oversight
    
    We need to pass the accessible to the signal handler.

 gtk/a11y/gtkspinbuttonaccessible.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/a11y/gtkspinbuttonaccessible.c b/gtk/a11y/gtkspinbuttonaccessible.c
index e50d742897..01e2a15634 100644
--- a/gtk/a11y/gtkspinbuttonaccessible.c
+++ b/gtk/a11y/gtkspinbuttonaccessible.c
@@ -76,7 +76,7 @@ gtk_spin_button_accessible_initialize (AtkObject *obj,
 {
   ATK_OBJECT_CLASS (gtk_spin_button_accessible_parent_class)->initialize (obj, data);
 
-  g_signal_connect (data, "notify::adjustment", G_CALLBACK (on_adjustment_changed), NULL);
+  g_signal_connect (data, "notify::adjustment", G_CALLBACK (on_adjustment_changed), obj);
 }
 
 static void