Fix initialization of OC_Filesystem setup from DAV

lib/connector/sabre/auth.php

@@ -33,7 +33,7 @@ class OC_Connector_Sabre_Auth extends Sabre_DAV_Auth_Backend_AbstractBasic {
 	protected function validateUserPass($username, $password){
 		OC_Util::setUpFS();//login hooks may need early access to the filesystem
 		if(OC_User::login($username,$password)){
-			OC_Util::setUpFS();
+			OC_Util::setUpFS($username);
 			return true;
 		}
 		else{