[glib] Allow null object in g_simple_async_report_gerror_in_idle

[Christian Dywan <cdywan src gnome org>]

commit 1f9e34cab7b474a2b98c52d111a61f596ae33b58
Author: Christian Dywan <christian twotoasts de>
Date:   Mon Dec 20 17:15:15 2010 +0100

    Allow null object in g_simple_async_report_gerror_in_idle
    
    Follow-up on bug 636673.

 gio/gsimpleasyncresult.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gio/gsimpleasyncresult.c b/gio/gsimpleasyncresult.c
index 458cf2e..30d5123 100644
--- a/gio/gsimpleasyncresult.c
+++ b/gio/gsimpleasyncresult.c
@@ -975,7 +975,7 @@ g_simple_async_report_error_in_idle (GObject             *object,
 
 /**
  * g_simple_async_report_gerror_in_idle:
- * @object: a #GObject.
+ * @object: (allow-none): a #GObject, or %NULL
  * @callback: a #GAsyncReadyCallback.
  * @user_data: user data passed to @callback.
  * @error: the #GError to report
@@ -992,7 +992,7 @@ g_simple_async_report_gerror_in_idle (GObject *object,
 {
   GSimpleAsyncResult *simple;
  
-  g_return_if_fail (G_IS_OBJECT (object));
+  g_return_if_fail (!object || G_IS_OBJECT (object));
   g_return_if_fail (error != NULL);
 
   simple = g_simple_async_result_new_from_error (object,