bug#27535: 25.2; mime messages ignore rmail-show-message-verbose-min

[Eli Zaretskii]

> From: Ken Olum <kdo@cosmos.phy.tufts.edu>
> Date: Thu, 29 Jun 2017 16:01:16 -0400
> 
> The variable rmail-show-message-verbose-min is supposed to be a lower
> limit on the size of messages for which there will be a progress report
> when the message is displayed.  However, if the message has mime headers
> (as most messages today do) rmail always gives the progress report.
> 
> I suggest deleting the second copy of
> 
>             (setq showing-message t)
>             (message "Showing message %d..." msg)
> 
> in rmail-show-message-1.

Thanks, done in master.