fixed warning and deprecated errors

includes/functions.mod_rewrite.php

@@ -615,8 +615,7 @@ function mr_loadConfiguration($clientId, $forceReload = false) {
 }
 
 function mr_getConfigurationFilePath($clientId) {
-    $clientConfig = cRegistry::getClientConfig((int) $clientId);
-    $fePath = $clientConfig['path']['frontend'];
+    $fePath = cRegistry::getFrontendPath();
     return $fePath . 'data/config/' . CL_ENVIRONMENT . '/config.mod_rewrite.php';
 }