bug#26995: 26.0.50; emacsclient --tty FILE flashes previous frame's buffer before loading FILE

[Eli Zaretskii]

> From: Aaron Jensen <aaronjensen@gmail.com>
> Date: Mon, 5 Feb 2018 01:56:22 -0500
> Cc: 26995@debbugs.gnu.org
> 
> Please see attached patch and let me know if this method is
> acceptable. It’s perhaps a little kludgy because sometimes a frame is
> created and sometimes it isn’t so we need both methods of ensuring the
> initial frame is set properly. This does appear to work for all
> scenarios I tested, however.

Thanks, this LGTM.  Please add ChangeLog-style commit log message for
the changes, and I will then push this to the master branch.