rpcdaemon: eth_call returns error when (optional) sender parameter is absent

[sealer3]

When trying to query a smart contract, such as like this:

{
	"id": 19,
	"jsonrpc": "2.0",
	"method": "eth_call",
	"params": [
		{
			"data": "0xfeaf968c",
			"to": "0xffe5b13cb108a99edf87926faf09d5008186dd91"
		},
		"latest"
	]
}

Erigon replies with an error saying the sender cannot be recovered:

{
	"jsonrpc": "2.0",
	"id": 19,
	"error": {
		"code": -32000,
		"message": "malformed transaction: cannot recover sender"
	}
}

Note that by default, if a sender isn't given it's assumed to be the zero address.