[Dovecot] quota bug

[Amr Shahin]

Hello,
please find this log from dovecot server
* OK Dovecot ready.
1 login amrtest3 *********
1 OK Logged in.
1 getquotaroot inbox
* QUOTAROOT "inbox"
1 OK Getquotaroot completed.
1 logout
* BYE Logging out
1 OK Logout completed.

the user has unlimited quota, the back end authentication is mysql database,
here is the record from the database

account        quota
amrtest3          0
...

thanks for your help