bug#34614: 26.1.92; When reading input in mini-buffer, message to each area overide the input prompt

[martin rudalics]

> I see the variable 'minibuffer-message-timeout’ is defined in c
> source code. Maybe emacs processes it in c source code already,
> which conflicts with sit-for?

I before verified with the debugger that 'minibuffer-message-timeout'
is not processed during autoreverting.  It is processed only if
triggered from the main loop, that is, after reading a character.

martin