Replace one remaining $span->{XPD} with xpd_of_span().
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Merged revisions 9648 via svnmerge from
http://svn.digium.com/svn/dahdi/tools/trunk
git-svn-id: http://svn.astersk.org/svn/dahdi/tools/branches/2.4@9742 17933a7a-c749-41c5-a318-cba88f637d49