BUG - Notices found in the heartbeat call

- The attribute "workspaces" not defined in the class "serverConfiguration"
- Define the missing attribute in the class

workflow/engine/classes/class.serverConfiguration.php

@@ -53,6 +53,7 @@ class serverConf {
   var $logins;
   private $lanDirection;
   private $lanLanguage;
+  public $workspaces = array();
 
 
   public function __construct() {