Minor optimization in ValidatorServiceProvider

ReflectionClass is only needed if a translator is present. Moving usage of it inside the related conditional means one less object instantiation.

src/Silex/Provider/ValidatorServiceProvider.php

@@ -29,9 +29,8 @@ class ValidatorServiceProvider implements ServiceProviderInterface
     public function register(Application $app)
     {
         $app['validator'] = $app->share(function ($app) {
-            $r = new \ReflectionClass('Symfony\Component\Validator\Validator');
-
             if (isset($app['translator'])) {
+                $r = new \ReflectionClass('Symfony\Component\Validator\Validator');
                 $app['translator']->addResource('xliff', dirname($r->getFilename()).'/Resources/translations/validators.'.$app['locale'].'.xlf', $app['locale'], 'validators');
             }