Hi,

we're currently working on Haskell bindings for notmuch[1] and stumbled
over an oddity in relation to the function notmuch_thread_get_authors in
that it can be NULL.

Checking other bindings it seems there is an explicit check for NULL and
we're wondering if that is really necessary.  Perhaps a patch could
initialize `*authors` in the _resolve_thread_authors_string function to an
empty string OR at least mention it in the API documentation that the
return value can be NULL?

Any thoughts?

[1] - https://github.com/purebred-mua/hs-notmuch

Kind Regards,
-- 
Róman Joost
email: roman@bromeco.de
GPG key: 3A765B52