Re: tsearch tests: Disable tfind signature check on Cygwin.

[Bruno Haible via Gnulib discussion list]

Collin Funk wrote:
> I have written to the Cygwin list in hopes they fix this
> since it will cause annoying -Wdiscarded-qualifiers warnings in
> applications that expect the POSIX prototype [1].
> 
> Pushed the attached patch to disable the signature check and document
> the differing prototype.

Thanks!