[Security] use deep flag when retrieving username + password

src/Symfony/Component/Security/Http/Firewall/AbstractAuthenticationListener.php

@@ -246,7 +246,7 @@ abstract class AbstractAuthenticationListener implements ListenerInterface
             return $this->options['default_target_path'];
         }
 
-        if ($targetUrl = $request->get($this->options['target_path_parameter'])) {
+        if ($targetUrl = $request->get($this->options['target_path_parameter'], null, true)) {
             return $targetUrl;
         }
 

src/Symfony/Component/Security/Http/Firewall/UsernamePasswordFormAuthenticationListener.php

@@ -70,8 +70,8 @@ class UsernamePasswordFormAuthenticationListener extends AbstractAuthenticationL
             }
         }
 
-        $username = trim($request->get($this->options['username_parameter']));
-        $password = $request->get($this->options['password_parameter']);
+        $username = trim($request->get($this->options['username_parameter'], null, true));
+        $password = $request->get($this->options['password_parameter'], null, true);
 
         $request->getSession()->set(SecurityContextInterface::LAST_USERNAME, $username);