Don't crash if saving runs out of disk space while in the middle of moving multiple files to new/ or cur/ directories and the already moved files had keywords.
Don't crash if saving runs out of disk space while in the middle of moving
multiple files to new/ or cur/ directories and the already moved files had
keywords.

--HG--
branch : HEAD

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