bug#16347: 24.3.50; Company pseudo-tooltip refresh problem when expanded down at eob

[Eli Zaretskii]

> Date: Thu, 09 Jan 2014 17:23:02 +0400
> From: Dmitry Gutov <dgutov@yandex.ru>
> CC: monnier@IRO.UMontreal.CA, 16347@debbugs.gnu.org
> 
> Sorry, you both. Here's the missing piece:
> 
> (setq bidi-display-reordering nil)

OK, now I see the problem.

> This is pretty low-level var, so maybe it's not even supposed to be set 
> by a user.

Indeed, it isn't.  But in this case, all it does is enable a redisplay
optimization that is disabled when bidi-display-reordering is non-nil.
So there's a bug either in that redisplay optimization or in the
conditions that enable it (probably the latter).

I will take a look.