1.7.5: Occasional failure of CreatePipe or signal handing due to thread-unsafe code in cwdstuff::set

[Earnie]

Corinna Vinschen wrote:
>
>  Or don't start the Win32 app at all if the path is not valid. However
>  we have to call SetCurrentDirectory at least once, for the first
>  Cygwin app, into a spot it doesn't block the aforementioned rmdir.
>  C:\ comes to mind.  It's the one directory which always exists and
>  it's not removable anyway.
>

That should be SYSTEMDRIVE and not a hard C:\.  There is no guarantee 
that C: drive is present.

Earnie