bug#21173: 25.0.50; New frames positioned off screen with multiple monitors

[Eli Zaretskii]

> From: Andy Moreton <andrewjmoreton@gmail.com>
> Date: Wed, 28 Oct 2015 17:25:31 +0000
> 
> > To see the difference, you need a test case where the selected frame
> > and the frame used in your code are different.
> 
> Please suggest a suitable test case. The patch fixed the original bug,
> and has not caused me any problems in daily usage.

Indeed, I missed the fact that this code is only interested in the
"display", not the frame.  And the w32 build of Emacs only supports a
single display, so the frame indeed doesn't matter.  Which means you
could invoke Fw32_display_monitor_attributes_list with the argument of
Qnil, and still get the same effect.

Sorry for the noise.