empty v1 transactions can be submitted

[GlenDC]

Can only done once per network, as the ID of an empty v0/v1 transaction is always empty, so not too bad, but still a bad bug.

[robvanmieghem]

@glendc can you paste an example of an empty transaction?

[GlenDC]

• v0 Transaction: {} or {"version":0}
• v1 Transaction: {"version":1}