[PATCH] Prevent segmentation fault in notmuch_database_close

[David Bremner]

On Sun, 19 Feb 2012 00:56:57 +0100, Justus Winter <4winter at informatik.uni-hamburg.de> wrote:
> Previously opening a notmuch database in read write mode that has been
> locked resulted in the notmuch_database_open function executing
> notmuch_database_close as a cleanup function. notmuch_database_close
> failed to check whether the xapian database has in fact been created.
> 

Pushed.

d