title: Store a single byte in a protobuf message
body: <p>What data type do I use to store a single byte in a protocol buffer message? Seeing the list at <a href="https://developers.google.com/protocol-buffers/docs/proto#scalar" rel="nofollow">https://developers.google.com/protocol-buffers/docs/proto#scalar</a> it seems like one of the *int32 types are the best fit. Is there a more efficient way to store a single byte?</p>