fix wrong variable use in parse_url

lib/Doctrine/DBAL/DriverManager.php

@@ -232,7 +232,7 @@ final class DriverManager
         // (pdo_)?sqlite3?:///... => (pdo_)?sqlite3?://localhost/... or else the URL will be invalid
         $url = preg_replace('#^((?:pdo_)?sqlite3?):///#', '$1://localhost/', $url);
         
-        $url = parse_url($params['url']);
+        $url = parse_url($url);
         
         if ($url === false) {
             throw new DBALException('Malformed parameter "url".');