[gegl] buffer: fix failed freeing of an slist

[Ville Sokk <villesokk src gnome org>]

commit 8441be59f420b5462dc30de388d36670ef29b72c
Author: Ville Sokk <ville sokk gmail com>
Date:   Sun Sep 30 19:29:40 2012 +0300

    buffer: fix failed freeing of an slist

 gegl/buffer/gegl-tile-backend-file-async.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/gegl/buffer/gegl-tile-backend-file-async.c b/gegl/buffer/gegl-tile-backend-file-async.c
index 8c08bf9..1aa5cc7 100644
--- a/gegl/buffer/gegl-tile-backend-file-async.c
+++ b/gegl/buffer/gegl-tile-backend-file-async.c
@@ -904,10 +904,9 @@ gegl_tile_backend_file_free_free_list (GeglTileBackendFile *self)
   GSList *iter = self->free_list;
 
   for (; iter; iter = iter->next)
-    {
-      g_free (iter->data);
-      g_slist_free (iter);
-    }
+    g_free (iter->data);
+
+  g_slist_free (self->free_list);
 
   self->free_list = NULL;
 }