Issue #1703242 by solomongifford: Prevent the second call by PURL module.

rename_admin_paths.module

@@ -83,6 +83,11 @@ function rename_admin_paths_url_outbound_alter(&$path, &$options, $original_path
  */
 function rename_admin_paths_url_inbound_alter(&$path, $original_path, $path_language) {
 
+  // Prevent the second call by PURL module (@see http://drupal.org/node/1703242)
+  if (module_exists('purl') && purl_inited()) {
+    return;
+  }
+
   // Admin path
   if (variable_get('rename_admin_path', NULL)) {
     $rename_admin_path_value = variable_get('rename_admin_path_value', 'backend');