Changed mapping of 'validator.validator_service_ids' to use ternary operator

src/Silex/Provider/ValidatorServiceProvider.php

@@ -59,12 +59,7 @@ class ValidatorServiceProvider implements ServiceProviderInterface
         });
 
         $app['validator.validator_factory'] = $app->share(function() use ($app) {
-            $validators = array();
-            if (isset($app['validator.validator_service_ids'])) {
-                foreach ($app['validator.validator_service_ids'] as $alias => $service) {
-                    $validators[$alias] = $service;
-                }
-            }
+            $validators = isset($app['validator.validator_service_ids']) ? $app['validator.validator_service_ids'] : array();
 
             return new ConstraintValidatorFactory($app, $validators);
         });