ports/188143: x11-clocks/glclock: Fix build on -current

[edwin at FreeBSD.org]

Synopsis: x11-clocks/glclock: Fix build on -current

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: edwin
Responsible-Changed-When: Mon Mar 31 18:40:10 UTC 2014
Responsible-Changed-Why: 
miwi@ wants this submitter's PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=188143