ports/137348: security/xca: fix build

[miwi at FreeBSD.org]

Synopsis: security/xca: fix build

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: miwi
Responsible-Changed-When: Sun Aug 2 10:06:35 UTC 2009
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=137348