[gtk+/gtk-3-2] radiotoolbutton: Fix the annotation for get_group()

[Matthias Clasen <matthiasc src gnome org>]

commit 96e95d0a9fd0fa9f30d52e6d0e5a47201e09c3ed
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Thu Oct 27 18:51:38 2011 +0100

    radiotoolbutton: Fix the annotation for get_group()
    
    Use the same annotation used by gtk_radio_button_get_group().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=662870

 gtk/gtkradiotoolbutton.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkradiotoolbutton.c b/gtk/gtkradiotoolbutton.c
index 56f45e3..c1db17f 100644
--- a/gtk/gtkradiotoolbutton.c
+++ b/gtk/gtkradiotoolbutton.c
@@ -243,7 +243,7 @@ get_radio_button (GtkRadioToolButton *button)
  *
  * Returns the radio button group @button belongs to.
  *
- * Return value: (transfer none): The group @button belongs to.
+ * Return value: (transfer none) (element-type GtkRadioButton): The group @button belongs to.
  *
  * Since: 2.4
  */