bug#16853: 24.3.50; ert-run-tests-interactively difficult to abort

[Eli Zaretskii]

> From: Helmut Eller <eller.helmut@gmail.com>
> Date: Mon, 08 Sep 2014 16:02:53 +0200
> 
> Try this:
>  emacs -batch -eval '(message "%s" (pos-visible-in-window-p (window-start)))'
> 
> It prints nil.  Shouldn't window-start always be visible?

No, not when the window is not "live".