[Dovecot] "multiple quota roots" complains

[Kostik]

TS> On Fri, 2009-10-16 at 22:16 +0400, Kostik wrote:
>> TS> Oh, it fails too late. Does this help?
>> TS> http://hg.dovecot.org/dovecot-1.2/rev/ebb44fb7d9de
>> 
>> It helped, but only half:
>> ---
>> close(/var/virtual/mail/I/I/koc.lock) failed: Disk quota exceeded

TS> This was again the only error? It's still failing too late. It should be
TS> failing in fdatasync() earlier. What does it log with attached patch?

Yes, this is full debug log. Log after patch:
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close(/var/virtual/mail/I/I/koc.lock) failed: Disk quota exceeded
fdatasync() succeeded
from=<>, msgid=: saved mail to INBOX
---