[gtk+] Add missing annotation for gtk_combo_box_text_get_active_text()

[SÃbastien Wilmet <swilmet src gnome org>]

commit f48e9b1d2081b7999920172101ad3d97e3a90b80
Author: Tristan Brindle <tristan fugro-fsi com au>
Date:   Mon Nov 12 13:44:10 2012 +0800

    Add missing annotation for gtk_combo_box_text_get_active_text()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=688140

 gtk/gtkcomboboxtext.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkcomboboxtext.c b/gtk/gtkcomboboxtext.c
index 81bbd19..e09f3ef 100644
--- a/gtk/gtkcomboboxtext.c
+++ b/gtk/gtkcomboboxtext.c
@@ -576,8 +576,8 @@ gtk_combo_box_text_remove_all (GtkComboBoxText *combo_box)
  * function will return its contents (which will not necessarily
  * be an item from the list).
  *
- * Returns: a newly allocated string containing the currently
- *     active text. Must be freed with g_free().
+ * Returns: (transfer full): a newly allocated string containing the
+ *     currently active text. Must be freed with g_free().
  *
  * Since: 2.24
  */