pkg-build-prereq-check:
 * fix version checking (by PeterPawn)
 * refs [http://www.ip-phone-forum.de/showthread.php?t=273762 this thread]


git-svn-id: file:///var/svn/freetz/trunk@12567 149334a1-2f27-0410-a3b9-fc62619ac1e6