[PATCH v1] emacs: Report a lack of matches when calling `notmuch-show'.

[David Edmondson]

On Sun, Feb 07 2016, Mark Walters wrote:
> However, I wonder if we actually want an error at all in this case,
> rather than just a "message". I think some people run with
> debug-on-error enabled and it might be annoying in that case (though
> clearly less annoying than the current situation).

How about (ding) (message "...") ?