bug#16736: Compiling a Lisp file causes display to flash off and on

[Eli Zaretskii]

> Date: Sat, 15 Feb 2014 10:24:44 +0200
> From: Eli Zaretskii <eliz@gnu.org>
> Cc: 16736@debbugs.gnu.org
> 
> Then step into update_window_line call in that loop.  The glyph rows
> of the tool-bar window don't have marginal areas, so when the loop
> calls update_window_line, only update_text_area is called from
> update_window_line.  There's call in update_text_area that compares
                               ^^^^
This should have been "code", sorry.