ndas:
 * fix build problem reported [http://www.ip-phone-forum.de/showthread.php?t=265339&p=1971928&viewfull=1#post1971928 here]


git-svn-id: file:///var/svn/freetz/trunk@11433 149334a1-2f27-0410-a3b9-fc62619ac1e6