diff --git a/application/modules/default/controllers/DlController.php b/application/modules/default/controllers/DlController.php
index f9ee9299a..28aa58f4b 100755
--- a/application/modules/default/controllers/DlController.php
+++ b/application/modules/default/controllers/DlController.php
@@ -1,116 +1,116 @@
 <?php
 
 /**
  *  ocs-webserver
  *
  *  Copyright 2016 by pling GmbH.
  *
  *    This file is part of ocs-webserver.
  *
  *    This program is free software: you can redistribute it and/or modify
  *    it under the terms of the GNU Affero General Public License as
  *    published by the Free Software Foundation, either version 3 of the
  *    License, or (at your option) any later version.
  *
  *    This program is distributed in the hope that it will be useful,
  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *    GNU Affero General Public License for more details.
  *
  *    You should have received a copy of the GNU Affero General Public License
  *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  **/
 class DlController extends Local_Controller_Action_DomainSwitch
 {
     
     public function indexAction()
     {
         $this->_helper->layout->disableLayout();
         
         $file_id = $this->getParam('file_id');
         $file_type = $this->getParam('file_type');
         $file_name = $this->getParam('file_name');
         $file_size = $this->getParam('file_size');
         $projectId = $this->getParam('project_id');
         if($this->hasParam('link_type')) {
         $linkType = $this->getParam('link_type');
         } else {
             $linkType = "download";
         }
         
         $modelProduct = new Default_Model_Project();
         $productInfo = $modelProduct->fetchProductInfo($projectId);
         
         $this->view->link_type = $linkType;
         $this->view->file_name = $file_name;
         $this->view->file_size = $file_size;
         $this->view->file_size_human = $this->humanFileSize($file_size);
         $this->view->project_title = $productInfo->title;
         
         $memberId = $this->_authMember->member_id;
 
         if ($_SERVER['REQUEST_METHOD'] == 'POST') { 
             if(isset($file_id) && isset($projectId) && isset($memberId)) {
                 $memberDlHistory = new Default_Model_DbTable_MemberDownloadHistory();
                 $data = array('project_id' => $projectId, 'member_id' => $memberId, 'file_id' => $file_id, 'file_type' => $file_type, 'file_name' => $file_name, 'file_size' => $file_size);
                 $memberDlHistory->createRow($data)->save();
             }
             
             //create ppload download hash: secret + collection_id + expire-timestamp
             $salt = PPLOAD_DOWNLOAD_SECRET;
             $collectionID = $productInfo->ppload_collection_id;
             $timestamp = time() + 3600; // one hour valid
             //20181009 ronald: change hash from MD5 to SHA512
             //$hash = md5($salt . $collectionID . $timestamp); // order isn't important at all... just do the same when verifying
             $hash = hash('sha512',$salt . $collectionID . $timestamp); // order isn't important at all... just do the same when verifying
             $url = PPLOAD_API_URI . 'files/download/id/' . $file_id . '/s/' . $hash . '/t/' . $timestamp . '/u/' . $memberId . '/' . $file_name;
             
             if($linkType == 'install') {
                 $helperCatXdgType = new Default_View_Helper_CatXdgType();
                 $xdgType = $helperCatXdgType->catXdgType($productInfo->project_category_id);
 
                 $url = 'ocs://install'
                     . '?url=' . urlencode($url)
                     . '&type=' . urlencode($xdgType)
                     . '&filename=' . urldecode($file_name);
             }
             $this->view->url = $url;
         }
         
 
     }
     
     function formatBytes($bytes, $precision = 2) { 
         $units = array('B', 'KB', 'MB', 'GB', 'TB'); 
 
         $bytes = max($bytes, 0); 
         $pow = floor(($bytes ? log($bytes) : 0) / log(1024)); 
         $pow = min($pow, count($units) - 1); 
 
         // Uncomment one of the following alternatives
         // $bytes /= pow(1024, $pow);
         // $bytes /= (1 << (10 * $pow)); 
 
         return round($bytes, $precision) . ' ' . $units[$pow]; 
     } 
     
     function humanFileSize($bytes) {
-        if(!empty(bytes))
+        if(!empty($bytes))
         {
             $size = round($bytes / 1048576, 2);
             if($size == 0.0)
             {
                return '0.01 MB';
             }else
             {
                return $size.' MB';
             }
         }
         else
         {
            return null;
         }
     }
 
    
 }
\ No newline at end of file