bug#18528: 24.3.93; Crash during restoration of frameset from desktop

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 23 Sep 2014 22:30:55 +0300
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 18528@debbugs.gnu.org
> 
> > Date: Tue, 23 Sep 2014 21:17:02 +0200
> > From: martin rudalics <rudalics@gmx.at>
> > CC: bug-gnu-emacs@gnu.org
> > 
> >        return (((WINDOW_PIXEL_WIDTH (w) + ch_width - 1)
> > 	       / ch_width) * w->ncols_scale_factor
> > 	      /* 2 partially visible columns in the text area.  */
> > 	      + 2
> > 	      /* One partially visible column at the right
> > 		 edge of each marginal area.  */
> > 	      + 1 + 1);
> > 
> > so columns aren't involved IIUC.
> 
> I was talking about new_lines

For which we do a similar calculation, I see.

So now I don't understand why you asked about rounding up, since we
evidently already do.