Fix on exception pass null as code (#138)

Author: gmponos

src/Plugin/CookiePlugin.php

@@ -130,7 +130,7 @@ private function createCookie(RequestInterface $request, $setCookie)
                                 $name,
                                 $value
                             ),
-                            null,
+                            0,
                             $e
                         );
                     }