Enum field decoding skipping 0 value

[jalandis]

enum values with 0 are decoded incorrectly.

message AccountAccess {
    enum AccessStatus {
        INACTIVE = 0;
        PENDING = 1;
        ACTIVE = 2;
    }

    AccessStatus status = 1;
}

if (message.status !== 0) {
   obj.status = accountAccess_AccessStatusToJSON(message.status);
}

An inactive value is decoded as undefined instead of INACTIVE.

[stephenh]

It's part of the protobuf3 JSON spec that default values can/should be left out of the JSON:

https://protobuf.dev/programming-guides/proto3/#json

But there is also a emitDefaultValues=json-methods flag if you don't like that behavior.