[glib] Clarify docs of g_async_result_get_source_object

[Matthias Clasen <matthiasc src gnome org>]

commit 5fdb169b72b749218766e507deab491c5f5b0d9e
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 29 20:33:39 2009 -0400

    Clarify docs of g_async_result_get_source_object
    
    It returns a new reference. Reported in bug 596748

 gio/gasyncresult.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/gio/gasyncresult.c b/gio/gasyncresult.c
index 4eb2a36..936a7bd 100644
--- a/gio/gasyncresult.c
+++ b/gio/gasyncresult.c
@@ -176,12 +176,13 @@ g_async_result_get_user_data (GAsyncResult *res)
 
 /**
  * g_async_result_get_source_object:
- * @res: a #GAsyncResult.
- * 
+ * @res: a #GAsyncResult
+ *
  * Gets the source object from a #GAsyncResult.
- * 
- * Returns: the source object for the @res.
- **/
+ *
+ * Returns: a new reference to the source object for the @res,
+ *    or %NULL if there is none.
+ */
 GObject *
 g_async_result_get_source_object (GAsyncResult *res)
 {