[gtk] builder: Use standard padding

[Matthias Clasen <matthiasc src gnome org>]

commit 50f753c60ab94c5798d6a8f73b67023b7a1c214e
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun May 26 21:43:34 2019 -0400

    builder: Use standard padding

 gtk/gtkbuilder.h | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)
---
diff --git a/gtk/gtkbuilder.h b/gtk/gtkbuilder.h
index e28655dbf6..4941322014 100644
--- a/gtk/gtkbuilder.h
+++ b/gtk/gtkbuilder.h
@@ -101,15 +101,9 @@ struct _GtkBuilderClass
   GType (* get_type_from_name) (GtkBuilder *builder,
                                 const char *type_name);
 
-  /* Padding for future expansion */
-  void (*_gtk_reserved1) (void);
-  void (*_gtk_reserved2) (void);
-  void (*_gtk_reserved3) (void);
-  void (*_gtk_reserved4) (void);
-  void (*_gtk_reserved5) (void);
-  void (*_gtk_reserved6) (void);
-  void (*_gtk_reserved7) (void);
-  void (*_gtk_reserved8) (void);
+  /*< private >*/
+
+  gpointer padding[8];
 };
 
 GDK_AVAILABLE_IN_ALL