[tlbuild] mendexk test failure on Cygwin

[Ken Brown]

Hi Peter,

On 1/9/2015 5:11 AM, Peter Breitenlohner wrote:
> I'd say that is definitely a bug, no such problem under
> Linux.  To work around the bug I have used your patch and replaced
> sizeof(buf) by BUFFERLEN (r36004). IMHO this is somewhat against the
> spirit of variadic macros, but so be it.

Thanks.

Regards,

Ken