[gtk] text tag: Use standard padding

[Matthias Clasen <matthiasc src gnome org>]

commit 1e2874fc592fcd950f303968babedac6675d4e78
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 27 22:30:33 2019 +0000

    text tag: Use standard padding

 gtk/gtktexttag.h | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/gtk/gtktexttag.h b/gtk/gtktexttag.h
index 454cd93861..a314ab766a 100644
--- a/gtk/gtktexttag.h
+++ b/gtk/gtktexttag.h
@@ -86,11 +86,9 @@ struct _GtkTextTagClass
 {
   GObjectClass parent_class;
 
-  /* Padding for future expansion */
-  void (*_gtk_reserved1) (void);
-  void (*_gtk_reserved2) (void);
-  void (*_gtk_reserved3) (void);
-  void (*_gtk_reserved4) (void);
+  /*< private >*/
+
+  gpointer padding[8];
 };
 
 GDK_AVAILABLE_IN_ALL