bug#31546: 27.0.50; macOS child frames with no mode-line mouse click problem

[Eli Zaretskii]

> From: Aaron Jensen <aaronjensen@gmail.com>
> Date: Thu, 24 May 2018 04:06:19 -0700
> Cc: 31546@debbugs.gnu.org, Alan Third <alan@idiocy.org>
> 
> Hm, it appears that it fixes the issue when the last visible line is
> clicked, but if 'frame-resize-pixelwise' is non-nil and a partially visible
> line is clicked it still scrolls to make that line fully visible even if
> the buffer does not extend to that line. Perhaps it would also be useful to
> prevent attempting to scroll into view a line that the buffer does not
> extend to?

What do you mean by "a line that the buffer does not extend to"?  Is
that empty space beyond EOB, or is that something else?