Fix: missing class

htdocs/mailmanspip/class/mailmanspip.class.php

 <?php
 /* Copyright (C) 2002-2003 Rodolphe Quiedeville <rodolphe@quiedeville.org>
  * Copyright (C) 2002-2003 Jean-Louis Bergamo   <jlb@j1b.org>
- * Copyright (C) 2004-2011 Laurent Destailleur  <eldy@users.sourceforge.net>
+ * Copyright (C) 2004-2013 Laurent Destailleur  <eldy@users.sourceforge.net>
  * Copyright (C) 2004      Sebastien Di Cintio  <sdicintio@ressource-toi.org>
  * Copyright (C) 2004      Benoit Mortier       <benoit.mortier@opensides.be>
  * Copyright (C) 2009      Regis Houssin        <regis.houssin@capnetworks.com>
@@ -24,10 +24,11 @@
 /**
  *	\file       htdocs/mailmanspip/class/mailmanspip.class.php
  *	\ingroup    member
- *	\brief      File of class to manage members of a foundation
+ *	\brief      File of class to manage mailman and spip actions
  */
 
 require_once DOL_DOCUMENT_ROOT.'/core/class/commonobject.class.php';
+require_once DOL_DOCUMENT_ROOT.'/categories/class/categorie.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';