recent eieio changes -- 5de342720?

[Eric Abrahamsen]

I ought to have my head examined for updating Emacs git every couple of
days, but...

Some recent commit (I suspect 5de342720) changed things in EIEIO so that
(in my particular case) both Helm and the Gnus registry are blowing up
with:

eieio--class-slot-initarg: Wrong type argument: eieio--class,
[cl-struct-eieio--class registry-db nil ([cl-struct-eieio--class
eieio-persistent "This special class enables persistence through save
files...

Followed by the entire definition of eieio-persistent.

I've done a bootstrap or two and recompiled everything, and the problem
remains. I've put some things in the registry that I don't want to lose,
so I'd prefer not to roll back. So I'll just leave this here and then,
you know, sit tight and hope someone's watching...

Thanks,
Eric