[glib] Add an annotation

[Matthias Clasen <matthiasc src gnome org>]

commit bb221b68df5de89fce4cb70b789df6173d9c2c92
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Aug 30 10:02:32 2010 -0400

    Add an annotation

 gio/gdbusmessage.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gdbusmessage.c b/gio/gdbusmessage.c
index 41b28b2..d61a30a 100644
--- a/gio/gdbusmessage.c
+++ b/gio/gdbusmessage.c
@@ -709,7 +709,7 @@ g_dbus_message_get_unix_fd_list (GDBusMessage  *message)
 /**
  * g_dbus_message_set_unix_fd_list:
  * @message: A #GDBusMessage.
- * @fd_list: A #GUnixFDList or %NULL.
+ * @fd_list: (allow-none): A #GUnixFDList or %NULL.
  *
  * Sets the UNIX file descriptors associated with @message. As a
  * side-effect the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header