bug#27756: 26.0.50; Cursor jumps and disappears with Native Line Numbers turned on

[Eli Zaretskii]

> From: Ilya Khaprov <ilya.khaprov@publitechs.com>
> Date: Tue, 18 Jul 2017 12:42:35 +0000
> 
> I customized horizontal auto-scrolling like this:
> 
> hscroll-margin set to 1,
> hscroll-step set to 1 (tested with 2, same effect).
> display-line-numbers-width set to 3
> display-line-numbers set to t
> 
> When hscrolling starts, it goes ok for 4, 5 chars then buffer jumps to
> the beginning of the line (i.e. hscroll resets) and cursor disappears.
> 
> Can still hscroll with keyboard though (cursor remains somewhere on the
> right, not visible).

Thanks, I think I fixed this now.

Btw, the above settings produce some buggy behavior even without line
numbers, I guess not many people use such customizations.