bug#11464: 24.1.50; pos-visible-in-window-p returns a false positive with bidi text

[Eli Zaretskii]

> From: Ari Roponen <ari.roponen@gmail.com>
> Cc: mwd@cert.org,  11464@debbugs.gnu.org
> Date: Fri, 18 May 2012 17:39:39 +0300
> 
> In case it helps, I found out this:
> 
> Using emacs-24 rev. 107994 (your original patch):
> 
> ./emacs -Q -fn "DejaVu Sans Mono-10" -l bug.el
> => "Should be nil: nil"
> 
> ./emacs -Q -fn "DejaVu Sans Mono-12" -l bug.el
> => "Should be nil: t"
> 
> In both cases, the latin letters use the given font, and the Hebrew
> letters are displayed with corresponding "Arimo" font:
> 
>     xft:-unknown-DejaVu Sans 
> Mono-normal-normal-normal-*-16-*-*-*-m-0-iso10646-1 (#x44)
>     xft:-unknown-Arimo-normal-normal-normal-*-16-*-*-*-*-0-iso10646-1 (#x9BD)

Yes, this helps.  Thanks.