Some senders should use positiveMachineIntegerFor: for 64 bits compliance

I noticed:

primitiveSecondsClock primitiveClockLogAddresses

lot of MacMenubarPlugin which convert handles to Smalltalk int

These are probably 32 bits, but IMO it does not hurt to use machine integer - at least it's consistent with sqInt declaration :

primitiveImageFormatVersion primitiveHeartbeatFrequency

I may report more ...