ports/181060: x11-toolkits/blt: Fix build with Tcl/Tk 8.6

[edwin at FreeBSD.org]

Synopsis: x11-toolkits/blt: Fix build with Tcl/Tk 8.6

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: edwin
Responsible-Changed-When: Mon Aug 5 18:10:41 UTC 2013
Responsible-Changed-Why: 
miwi@ wants this submitter's PRs (via the GNATS Auto Assign Tool)

http://www.freebsd.org/cgi/query-pr.cgi?pr=181060