ports/172725: japanese/skk-tools: Fix build with clang

[edwin at FreeBSD.org]

Synopsis: japanese/skk-tools: Fix build with clang

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: edwin
Responsible-Changed-When: Mon Oct 15 18:10:55 UTC 2012
Responsible-Changed-Why: 
miwi@ wants his PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=172725