Revert "Altering DataObjectsAdapter w/ a patch suggested by dkubb since my last change, made the DOA, er... DOA on 1.9."
Revert "Altering DataObjectsAdapter w/ a patch suggested by dkubb since my last change, made the DOA, er... DOA on 1.9."

This reverts commit d7655eb9eac8de20fc76bdfa67067517863bb121.

* Null object handles this case even more efficiently

alloy/dm-core,engineyard/dm-core,datamapper/dm-core,tillsc/dm-core,tpitale/dm-core,ar-dm/ardm-core