bug fixes to emacs notmuch-tag-completion function

[Tomi Ollila]

On Mon, Apr 09 2012, Jameson Graef Rollins wrote:

> I had originally included this fixes as part of a more involved series
> to fix up tagging functions [0].  However, these are actually bug
> fixes that stand alone and should not be bogged down in a series
> that's likely going to take a while to come to fruition.  The changes
> here are pretty trivial, so hopefully they can get pushed quickly and
> I'll rework the rest of tagging fix up series on top of them.

LGTM.

>
> jamie.
>
> [0] id:"1333354853-25729-1-git-send-email-jrollins at finestructure.net"

Tomi