Check buffer size when creating a packet

[junha1]

And if the size is too small, it should be propagated as an error

[majecty]

Could you describe more the situation? If the size of a packet is small, is it error?

[junha1]

@majecty https://github.com/CodeChain-io/remote-trait-object/blob/master/remote-trait-object/src/packet.rs#L142