bug#9983: valgrind warning in draw_glyphs

[Eli Zaretskii]

> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: Dan Nicolaescu <dann@gnu.org>,  9983@debbugs.gnu.org
> Date: Mon, 07 Nov 2011 13:21:38 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > The other variables in the line being flagged, `start' and `i', are
> > also okay: `start' is one of the call arguments
> 
> Just being an argument does not necessarily make it ok.

Indeed.  I also thought about that, so I checked the callers two
levels up, and came up empty-handed.

I guess the optimization done by GCC 4.6 fooled valgrind as well.