Serializer should throw an exception when required fields are null

[elaberge]

Required nullable fields such as strings should throw an exception instead of being serialized as the "null" string.

it("Should throw an exception when required fields are null", function() {
    var objWithNull = {
        "name": null,
        "n64": 123
    }

    assert.throws(function() {
        var buffer = pb.serialize(objWithNull, "Test")
    }, Error)
})

[fuwaneko]

Yes, this is planned enhancement. Actually it will also throw if required field is not present at all.

[fuwaneko]

@elaberge missing required fields now throw an exception. Nulls too.