[gtk+] gtkborder: restore original struct definition

[William Hua <williamhua src gnome org>]

commit 5190d010d95010a845715c719c3b85a75e0c513a
Author: William Hua <william hua canonical com>
Date:   Thu Dec 17 12:18:03 2015 -0500

    gtkborder: restore original struct definition
    
    We're going to add back the original struct definition removed by
    a6e4de28, because using the typedef breaks all sorts of things like
    gtkmm and WebKit, and having separate struct definitions allows us to
    change the types in GdkBorder from gint16s to gints without breaking
    ABI.

 gtk/gtkborder.h |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkborder.h b/gtk/gtkborder.h
index 6df53aa..adfa29e 100644
--- a/gtk/gtkborder.h
+++ b/gtk/gtkborder.h
@@ -34,6 +34,8 @@
 
 G_BEGIN_DECLS
 
+typedef struct _GtkBorder GtkBorder;
+
 #define GTK_TYPE_BORDER (gtk_border_get_type ())
 
 /**
@@ -46,7 +48,13 @@ G_BEGIN_DECLS
  * A struct that specifies a border around a rectangular area
  * that can be of different width on each side.
  */
-typedef GdkBorder GtkBorder;
+struct _GtkBorder
+{
+  gint16 left;
+  gint16 right;
+  gint16 top;
+  gint16 bottom;
+};
 
 GDK_AVAILABLE_IN_ALL
 GType      gtk_border_get_type (void) G_GNUC_CONST;