bug#13431: 24.2; UTF-8 causes bad reference position under Emacs Info

[Eli Zaretskii]

> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Thu, 27 Jun 2019 13:44:06 +0200
> Cc: 13431@debbugs.gnu.org
> 
> Joseph Oswald <josephoswald@gmail.com> writes:
> 
> > I did a bit of investigation: makeinfo apparently generates tag tables
> > using bytes, not characters; it seems Emacs Info is using goto-char
> > without the bytes-to-position conversion.
> 
> I tested this now, and it seemed like it jumped to the right position,
> so somebody fixed this during the past four years?

Yes, see bufferpos-to-filepos.