Better to handle the case where ````rxObj == NULL```` once at the top of this state and move directly to the next state.  There are 2 relevant state transitions when ````rxObj == NULL````.
* ````rxType == TYPE_OBJ_REQ```` means that this is a GET request for an unknown object and we should move directly to the CS state.  This is not an error condition.
* ````rxType != TYPE_OBJ_REQ```` means we're getting a SET/ACK/NACK for a nonexistent object.  This is an error and should increment the rxErrors stat and move to the SYNC state.

The remainder of the code in the OBJID state could then safely dereference rxObj since it would be clear that it points at a known object.