bug#45042: 27.1; emacs -nw on Windows does not always update cursor position on screen

[Ed Avis]

The problem still happens when I start the Alacritty terminal emulator on 
Windows, and

>set TERM=
>emacs -nw

(I think on Windows there is no difference between setting TERM to an empty 
string and unsetting it.)

--
Ed Avis <ed.avis@qmaw.com>
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