oc->image

[Ryan Lortie]

For the ObjectCode structure defined in rts/LinkerInternals.h:

Does anyone have a problem with me changing 'image' field from being a
(void *) to a (char *)?

I can't think of any ill effects that this would have that wouldn't
generate warnings and since no warnings are generated, it seems like a
safe thing to do.  It would cut down on the number of casts that are
done in the code by quite a lot.

Thoughts?

Cheers.