Allow assignment of olefonts to other olefonts

[Mike Hearn]

> Seems like you don't release the interface pointer that you do a query 
> interface on.

Oops.

> You shouldn't need to special case copying from the same object... just 
> make sure you always allocate a new piece of memory and copy the old 
> string name before freeing it.

Yeah. I put that in because it's exactly what the app does, ie

foo.font = foo.font;

or the equivalent, which doesn't seem to make much sense. But I expect 
you are right, it's unlikely to do anything special. I'll remove the check.

> If you change around the order of freeing, allocating and copying the 
> strings it would be a bit easier to make it work right and fix the above 
> problems.

Yes I see now, the code copies the string again.

thanks -mike