[gtk] widget: Fix a mission annotation

[Matthias Clasen <matthiasc src gnome org>]

commit 430ea05aea797eb7ab8759d59c9b011cfd0962e0
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Mar 17 01:08:02 2019 -0400

    widget: Fix a mission annotation

 gtk/gtkwidget.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index ca206fc6a4..7b5e2ed1e5 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -13315,7 +13315,7 @@ gtk_widget_set_focus_child (GtkWidget *widget,
  *
  * Returns the current focus child of @widget.
  *
- * Returns: (nullable): The current focus child of @widget,
+ * Returns: (nullable): (transfer none): The current focus child of @widget,
  *   or %NULL in case the focus child is unset.
  */
 GtkWidget *