[gtk] textview: Use standard padding

[Matthias Clasen <matthiasc src gnome org>]

commit c2fd6b9fa45f39e43968c1481dd92fa7bcc17b0b
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun May 26 15:25:46 2019 -0400

    textview: Use standard padding
    
    Given that GtkSourceView exists, we will have
    to keep GtkTextView subclassable until a replacement
    appears.

 gtk/gtktextview.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)
---
diff --git a/gtk/gtktextview.h b/gtk/gtktextview.h
index 74256b4877..21b953d2d1 100644
--- a/gtk/gtktextview.h
+++ b/gtk/gtktextview.h
@@ -189,11 +189,7 @@ struct _GtkTextViewClass
 
   /*< private >*/
 
-  /* Padding for future expansion */
-  void (*_gtk_reserved1) (void);
-  void (*_gtk_reserved2) (void);
-  void (*_gtk_reserved3) (void);
-  void (*_gtk_reserved4) (void);
+  gpointer padding[8];
 };
 
 GDK_AVAILABLE_IN_ALL