bug#10539: 24.0.92; low display-time-interval makes Emacs slow

[Eli Zaretskii]

> From: Stefan Monnier <monnier@IRO.UMontreal.CA>
> Cc: rgm@gnu.org, michael_heerdegen@web.de, 10539@debbugs.gnu.org
> Date: Mon, 30 Jan 2012 17:01:53 -0500
> 
> The corresponding parts would be:
> 1- the place where the C code (run via the Elisp code of
>    force-mode-line-update) sets those vars.
> 2- the place in the C code where those vars are checked later on during
>    redisplay so that they cause the mode-line to be refreshed.

OK, will do.