[gimp] app: check top_directory for plausibility

[Nils Philippsen <nphilipp src gnome org>]

commit 3a151bd1a974281c75611ef800e41cbbca7b9015
Author: Nils Philippsen <nils redhat com>
Date:   Fri Feb 10 15:17:09 2012 +0100

    app: check top_directory for plausibility

 app/core/gimpdata.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpdata.c b/app/core/gimpdata.c
index 6beefe7..27eaa3e 100644
--- a/app/core/gimpdata.c
+++ b/app/core/gimpdata.c
@@ -884,6 +884,12 @@ gimp_data_set_folder_tags (GimpData    *data,
    */
   if (top_directory)
     {
+      size_t top_directory_len = strlen (top_directory);
+
+      g_return_if_fail (g_str_has_prefix (dirname, top_directory)
+                        && (dirname[top_directory_len] == '\0'
+                            || G_IS_DIR_SEPARATOR (dirname[top_directory_len])));
+
       do
         {
           gchar   *basename = g_path_get_basename (dirname);