[PATCH 2/2] doc: Don't install emacs docs when they are not built

[David Bremner]

David Bremner <david at tethera.net> writes:

> In 40b025 we stopped building the notmuch-emacs documentation if
> HAVE_EMACS=0 (i.e. no emacs was detected by configure). Unfortunately
> we continued to try to install the (non-existent) documentation, which
> causes build/install failures.
>
> As a bonus, we also avoid installing the documentation if the user
> configures --without-emacs.

I've pushed this series as a new point release, and merged to master.

d