IsBad*Ptr patch

[Conrad Scott]

"Corinna Vinschen" <cygwin-patches@cygwin.com> wrote:
> Sory for the late response, I just had no objections against
that.

Not a problem and thanks for the thumbs up.  And sorry for
prodding you: I'm a bit shy of changing stuff on HEAD without an
explicit okay.

> I assume you tested it...

It's what I'm running with now and I've checked my various socket
test programs against it too, so that's a yes (famous last words
etc.).

I'll commit it in a moment.

// Conrad