[gimp] app: metadata undo: unref instead of free

[Hartmut Kuhse <hartmutkuhse src gnome org>]

commit 8dc7ff4504d812dd25a62223e3edea207178f1fb
Author: Hartmut Kuhse <hk_priv gmx de>
Date:   Thu Nov 14 21:45:06 2013 +0100

    app: metadata undo: unref instead of free

 app/core/gimpimageundo.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/core/gimpimageundo.c b/app/core/gimpimageundo.c
index 2faafa6..1c7d594 100644
--- a/app/core/gimpimageundo.c
+++ b/app/core/gimpimageundo.c
@@ -520,7 +520,7 @@ gimp_image_undo_free (GimpUndo     *undo,
 
   if (image_undo->metadata)
     {
-      g_free (image_undo->metadata);
+      g_object_unref (image_undo->metadata);
       image_undo->metadata = NULL;
     }