Avoid a NULL warning in mysql_init() when HAVE_ATTR_NULL capable compiler is used.
Avoid a NULL warning in mysql_init() when HAVE_ATTR_NULL capable compiler is used.

jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch