[glib] g_file_make_directory_with_parents: Fix error propagation

[Owen Taylor <otaylor src gnome org>]

commit b0bce4ad41937dabf7e5c94dcce3caf4e88f3f97
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Mon Jul 30 13:33:05 2012 +0200

    g_file_make_directory_with_parents: Fix error propagation
    
    When creating a directory fails for some reason other than
    the parent not existing, don't clear the error before we try
    to propagate it.
    
    To reproduce, run 'ostadmin init' on /ostree or otherwise try to
    run the function on a directory with a parent directory where the
    current user is not allowed to write.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=680823

 gio/gfile.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/gio/gfile.c b/gio/gfile.c
index f664875..3bdae74 100644
--- a/gio/gfile.c
+++ b/gio/gfile.c
@@ -3395,12 +3395,14 @@ g_file_make_directory_with_parents (GFile         *file,
       work_file = g_object_ref (parent_file);
 
       if (!result && my_error->code == G_IO_ERROR_NOT_FOUND)
-        list = g_list_prepend (list, parent_file);  /* Transfer ownership of ref */
+        {
+          g_clear_error (&my_error);
+          list = g_list_prepend (list, parent_file);  /* Transfer ownership of ref */
+        }
       else
         g_object_unref (parent_file);
     }
 
-  g_clear_error (&my_error);
   for (l = list; result && l; l = l->next)
     {
       result = g_file_make_directory ((GFile *) l->data, cancellable, &my_error);