bug#32605: [w64] (random) never returns negative

[Eli Zaretskii]

> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Sat, 14 Aug 2021 19:47:22 +0100
> 
> On Sat 14 Aug 2021, Eli Zaretskii wrote:
> 
> > Thanks, I've decided to go with a hybrid approach that doesn't change
> > how 32-bit builds behaved up to now.
> 
> That looks fine, and the bug reported by the OP now appears fixed in
> testing on 32bit and 64bit builds.

Thanks for testing.