corrected namespace

apps/files_external/lib/sftp.php

@@ -5,12 +5,11 @@
  * later.
  * See the COPYING-README file.
  */
+namespace OC\Files\Storage;
 
 set_include_path(get_include_path() . PATH_SEPARATOR . OC_App::getAppPath('files_external') . '/3rdparty/phpseclib/phpseclib');
 require('Net/SFTP.php');
 
-namespace OC\Files\Storage;
-
 class SFTP extends OC\Files\Storage\Common {
 	private $host;
 	private $user;