lib/n_d_get_version: catch exceptions and clarify the API
authorDavid Bremner <david@tethera.net>
Tue, 14 Jul 2020 22:31:10 +0000 (19:31 -0300)
committerDavid Bremner <david@tethera.net>
Wed, 22 Jul 2020 22:52:55 +0000 (19:52 -0300)
notmuch_database_get_version previously returned 0 on some errors, but
did not document this. Luckily 0 is not a valid database version.


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