[Maypole] no primary key says Class::DBI::Loader::Pg

[michael@diaspora.gen.nz]

>pg_catalog.pg_aggregate has no primary key at
>/usr/lib/perl5/site_perl/5.8.0/Class/DBI/Loader/Pg.pm
>line 22

See http://lists.netthink.co.uk/pipermail/maypole/2004-May/000287.html for
a patch to Class::DBI::Loader::Pg which fixes that problem with Pg 7.4.
    -- michael.