bug#56682: feature/improved-locked-narrowing 9dee6df39c: Reworked locked narrowing.

[Eli Zaretskii]

> Date: Sat, 01 Apr 2023 17:01:03 +0000
> From: Gregory Heytings <gregory@heytings.org>
> cc: 56682@debbugs.gnu.org, monnier@iro.umontreal.ca
> 
> 
> >> Okay, so what would be the correct calculation here?  This?
> >
> > Yes.
> >
> 
> Thanks.  Done in 097c5ee8f5, together with the FRAME_WINDOW_P fix.  Do you 
> have other comments/reservations?

Not specific ones, no.  I just hope there are no hidden rocks there,
as this code was not well tested.