postgres patch for autovacuum error in postgres

Hi All

I am using postgres-8.1.2 . I am getting the below error while autovacuuming template0 database :

2010-08-18 18:36:14 UTC LOG: autovacuum: processing database "template0"

2010-08-18 18:36:14 UTC ERROR: could not access status of transaction 3222599682

2010-08-18 18:36:14 UTC DETAIL: could not open file "pg_clog/0C01": No such file or directory

I got to know that this is because of some bug in postgres and has been fixed in postgres-8.1.6.

Due to some reason I don’t want to upgrade to  postgres-8.1.6.

So, could any of you please confirm if there is any postgres patch with the fix for autovacuum error

, where can I find that patch and can this patch be applied on postgres-8.1.2 .

Please reply …

Thanks…

Tamanna