- the logic has been revised to allow list copying with nullptr entries.
These previously would have thrown an error.
- remove PtrList trimTrailingNull() method.
It was unused and would result in inconsistent addressing sizes.
FIX: inconsistent sizing used for DynamicList/PtrDynList clearStorage()
- older code did not reset addressable size prior to clearStorage()
or transfer(). Only a latent bug until memory pools are used.
697b8a1436