[Dovecot] segfault in RC15

[Cor Bosman]

> >Dec 10 18:55:44 dovecot2.xs4all.nl dovecot: IMAP(XXX): Corrupted  
> >Index file /var/run/dovecot-index/l/ld/XXX/.INBOX/dovecot.index:  
> >Record [27].uid=0
> 
> Have you tried yet if rc17 fixes these?

No, I still see them. I have removed all index files beforehand so these
are all fresh rc17 indexes..

Jan 10 20:07:31 dovecot1.xs4all.nl dovecot: IMAP(XXXXXXXX): Corrupted Index file /var/run/dovecot-index/p/po/XXXXXXXX/.INBOX/dovecot.index: Record [18].uid=0

I see it about 5-10 times per hour, which is quite rarely on our busy
servers. Index files are on local FS. 

Cor