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.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot