Add additional oneof argument to public proto constructor
Add additional oneof argument to public proto constructor

If you have a oneof named 'oneof', this adds the ':oneof' key to
the constructor. So, you can supply a oneof-data struct here. This
is used for the optimized serializer, since the optimized serializer
uses the public constructor for whatever reason.

qitab/cl-protobufs,qitab/cl-protobufs