[glib] Silently handle icon being NULL

[Matthias Clasen <matthiasc src gnome org>]

commit 9d69c274e0e13294bbfd6488c220ab523d3e881a
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu May 2 21:00:57 2013 -0400

    Silently handle icon being NULL
    
    While an emblemed icon without a base icon is not very
    useful, no need to crash here.
    This was crashing the object finalization test in gtk.

 gio/gemblemedicon.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gemblemedicon.c b/gio/gemblemedicon.c
index 32e7341..6f977fd 100644
--- a/gio/gemblemedicon.c
+++ b/gio/gemblemedicon.c
@@ -72,7 +72,7 @@ g_emblemed_icon_finalize (GObject *object)
 
   emblemed = G_EMBLEMED_ICON (object);
 
-  g_object_unref (emblemed->priv->icon);
+  g_clear_object (&emblemed->priv->icon);
   g_list_free_full (emblemed->priv->emblems, g_object_unref);
 
   (*G_OBJECT_CLASS (g_emblemed_icon_parent_class)->finalize) (object);