ports/182226: dns/ddns: fix build without gcc for current

[wg at FreeBSD.org]

Synopsis: dns/ddns: fix build without gcc for current

Responsible-Changed-From-To: freebsd-ports-bugs->wg
Responsible-Changed-By: wg
Responsible-Changed-When: Thu Sep 19 16:19:44 UTC 2013
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=182226