[gtk] check menu item: Use standard padding

[Matthias Clasen <matthiasc src gnome org>]

commit 5e4512d4c7003fe9c7cbe0644cced7b8173c47f4
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 27 04:33:30 2019 +0000

    check menu item: Use standard padding

 gtk/gtkcheckmenuitem.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/gtk/gtkcheckmenuitem.h b/gtk/gtkcheckmenuitem.h
index 317639b281..c0d6b175ad 100644
--- a/gtk/gtkcheckmenuitem.h
+++ b/gtk/gtkcheckmenuitem.h
@@ -70,11 +70,7 @@ struct _GtkCheckMenuItemClass
 
   /*< private >*/
 
-  /* Padding for future expansion */
-  void (*_gtk_reserved1) (void);
-  void (*_gtk_reserved2) (void);
-  void (*_gtk_reserved3) (void);
-  void (*_gtk_reserved4) (void);
+  gpointer padding[8];
 };