[Dovecot] Problem compiling dovecot-antispam on Ubuntu 11.10 using Doveot 2.0.13

[Guillaume Hilt]

Hello,

Last dovecot available version on Ubuntu 11.10 AMD64 is dovecot 2.0.13.
dovecot-antispam package is compiled for dovecot 2.0.15.

So, i'm trying to compile a new dovecot antispam plugin.
I followed dovecot wiki but i'm running into this error :
Successfully compiled dspam.c (plugin).
mailbox.c: In function 'antispam_save_begin':
mailbox.c:138:12: error: 'struct mail_save_context' has no member named 
'copying_via_save'
mailbox.c: In function 'antispam_save_finish':
mailbox.c:174:12: error: 'struct mail_save_context' has no member named 
'copying_via_save'
Failed to compile mailbox.c (plugin)!

Any hint please ?

Regards,

-- 
   Guillaume Hilt