Persisting IdentityDictionary

[Chris Muller]

> You're using 'self keyHash: key' to find a specific bucket that should
> contain that object.  But 'self keyHash: key' may (and probably will)
> answer a different number for the same object each time it is
> materialized from the database unless it is somehow using the MagmaOID
> in place of the identityHash.

Right, you definitely cannot use Squeak's #identityHash in the equation.

Hm, let me about this a few days, I think an easy solution will appear..

 - Chris