bug#9990: valgrind warning in add_row_entry

[Eli Zaretskii]

> From: Dan Nicolaescu <dann@gnu.org>
> Cc: 9990@debbugs.gnu.org
> Date: Fri, 18 Nov 2011 16:43:11 -0500
> 
> >> Unfortunately it still complains in:
> >> 
> >> ==11270==    at 0x41314F: adjust_glyph_matrix (dispnew.c:612)
> >
> > What does this line say in your sources?
> >
> 
>               xassert (!row->enabled_p || verify_row_hash (row));

So it complains about `row' itself, or maybe about the enabled_p
field, is that right?

> And for the other complaint:
> ==11270==    by 0x415762: update_window (dispnew.c:4244)
> 
> is:
>    ptrdiff_t i = row->hash % row_table_size;

Yes, that was the original one, triggered by "C-h H".  But maybe it is
complaining about `row' itself, even here, not about the hash code?  I
will take another look.