[gtk+] Use G_DEFINE_INTERFACE macro in gtkbuildable

[Javier Jardón <jjardon src gnome org>]

commit af0a7aea5f6fc508ef0f5dd83babc39dc61225c6
Author: Javier Jardón <jjardon gnome org>
Date:   Fri Apr 9 02:50:52 2010 +0200

    Use G_DEFINE_INTERFACE macro in gtkbuildable
    
    https://bugzilla.gnome.org/show_bug.cgi?id=605186

 gtk/gtkbuildable.c |   15 +++++----------
 1 files changed, 5 insertions(+), 10 deletions(-)
---
diff --git a/gtk/gtkbuildable.c b/gtk/gtkbuildable.c
index d3a8d8e..299e5b4 100644
--- a/gtk/gtkbuildable.c
+++ b/gtk/gtkbuildable.c
@@ -25,18 +25,13 @@
 #include "gtkintl.h"
 #include "gtkalias.h"
 
-GType
-gtk_buildable_get_type (void)
-{
-  static GType buildable_type = 0;
 
-  if (!buildable_type)
-    buildable_type =
-      g_type_register_static_simple (G_TYPE_INTERFACE, I_("GtkBuildable"),
-				     sizeof (GtkBuildableIface),
-				     NULL, 0, NULL, 0);
+typedef GtkBuildableIface GtkBuildableInterface;
+G_DEFINE_INTERFACE (GtkBuildable, gtk_buildable, G_TYPE_OBJECT)
 
-  return buildable_type;
+static void
+gtk_buildable_default_init (GtkBuildableInterface *iface)
+{
 }
 
 /**