[gtk/matthiasc/for-master-2: 5/7] widget: Fix a memory leak with class actions

[Matthias Clasen <matthiasc src gnome org>]

commit fac435ba9827b6d0fb522306e1a720a33f767f90
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Feb 5 00:24:14 2020 +0100

    widget: Fix a memory leak with class actions
    
    This code was doing the wrong thing even if the parent class
    doesn't have actions.

 gtk/gtkwidget.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index d93b4b13a5..1ddee3026e 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -12957,9 +12957,9 @@ gtk_widget_class_add_action (GtkWidgetClass  *widget_class,
 
   if (priv->actions == NULL)
     priv->actions = g_ptr_array_new ();
-  else if (GTK_IS_WIDGET_CLASS (&widget_class->parent_class))
+  else
     {
-      GtkWidgetClass *parent_class = GTK_WIDGET_CLASS (&widget_class->parent_class);
+      GtkWidgetClass *parent_class = GTK_WIDGET_CLASS (g_type_class_peek (g_type_parent (G_TYPE_FROM_CLASS 
(widget_class))));
       GtkWidgetClassPrivate *parent_priv = parent_class->priv;
       GPtrArray *parent_actions = parent_priv->actions;