[gtk+] Fix an annotation

[Matthias Clasen <matthiasc src gnome org>]

commit 92411d2c84a24e79798064ec1f834554288c370c
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Sep 19 00:22:37 2010 -0400

    Fix an annotation

 gtk/gtktreeview.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtktreeview.c b/gtk/gtktreeview.c
index 0be63a7..7f3a4fa 100644
--- a/gtk/gtktreeview.c
+++ b/gtk/gtktreeview.c
@@ -15129,7 +15129,7 @@ gtk_tree_view_get_row_separator_func (GtkTreeView *tree_view)
 /**
  * gtk_tree_view_set_row_separator_func:
  * @tree_view: a #GtkTreeView
- * @func: a #GtkTreeViewRowSeparatorFunc
+ * @func: (allow-none): a #GtkTreeViewRowSeparatorFunc
  * @data: (allow-none): user data to pass to @func, or %NULL
  * @destroy: (allow-none): destroy notifier for @data, or %NULL
  *