[gtk+] Another since tag

[Matthias Clasen <matthiasc src gnome org>]

commit 94e9a35a16e07f855db094f6c446b652f150a041
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 24 11:31:23 2010 -0400

    Another since tag

 gtk/gtknotebook.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtknotebook.c b/gtk/gtknotebook.c
index b4591f5..7ad2704 100644
--- a/gtk/gtknotebook.c
+++ b/gtk/gtknotebook.c
@@ -642,6 +642,8 @@ gtk_notebook_class_init (GtkNotebookClass *class)
    * GtkNotebook:group-name:
    *
    * Group name for tab drag and drop.
+   *
+   * Since: 2.24
    */
   g_object_class_install_property (gobject_class,
 				   PROP_GROUP_NAME,