fixed locale when changing it on the translator itself

src/Silex/Translator.php

@@ -34,4 +34,11 @@ class Translator extends BaseTranslator
     {
         return $this->app['locale'];
     }
+
+    public function setLocale($locale)
+    {
+        $this->app['locale'] = $locale;
+
+        parent::setLocale($locale);
+    }
 }

tests/Silex/Tests/Provider/TranslationServiceProviderTest.php

@@ -135,4 +135,16 @@ class TranslationServiceProviderTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals('The german translation', $app['translator']->trans('key1'));
     }
+
+    public function testChangingLocaleViaTranslator()
+    {
+        $app = $this->getPreparedApp();
+
+        $this->assertEquals('The translation', $app['translator']->trans('key1'));
+
+        $app['translator']->setLocale('de');
+
+        $this->assertEquals('The german translation', $app['translator']->trans('key1'));
+        $this->assertEquals('de', $app['locale']);
+    }
 }