DDSXTY14 — TypeObject serialization needs additonal contraints

Section 7.3.3.6 TypeObject serialization specifies constraints in the serialization of TypeObject such that "the serialized result is bitwise identical independently of the vendor or platform where the serialization occurs."

However the list of constraints is not sufficient to guarantee identical serialization due to potential padding. An additional constraint should be added to specify that padding bytes should be set to zero