bug#42406: Mouse-wheel scrolling can be flickering

[Konrad Podczeck]

> Am 14.12.2020 um 16:47 schrieb martin rudalics <rudalics@gmx.at>:
> 
> > In view of the comments made by Eli, I made a shoot in the dark, and,
> >  in window.c, commented out the occurrences of wset_update_mode_line
> >  on lines 1850, 4011, 5630, 5819, 6079, as well as the respective line
> >  after the three statements lines where "Bug#15957" is written. With
> >  these (actually I have not testes which of these (out-commentings are
> >  relevant) the problem has completely gone. I am aware that this is
> >  not a real solution, but it shows that there is some room. Which are
> >  the risks caused by these changes of the code?
> 
> Does the line number displayed in the mode line update correctly when
> you do that and scroll the window?

Yes, as before. Should there be a problem now?
> 
> martin