signrawtransactionwithkey gives confusing error when missing redeemScript

[ajtowns]

Forgetting to include the redeemscript when invoking signrawtransactionwithkey used to give a useful error:

$ bitcoin-cli -regtest signrawtransactionwithkey "02000000018a24833c36be23272080d6be8a53e36586b81e0ac447e1298ee58e18cc96bdee0100000000ffffffff0118246bee0000000017a914e139e3904e9e69ecbce87b0fcfb73b1b0e3b9e818700000000" '["cUJ7bUweEgENv4ixezsSyZa2uBJxR37iFLtCt18gSvkjpkj7CmMr"]'  '[{"txid":"eebd96cc188ee58e29e147c40a1eb88665e3538abed680202723be363c83248a","vout":1,"scriptPubKey":"0020f89f2138a58a2042310f297259ca8050bcaecd3a0f3c936edffb7e38e31d775a","amount":"40.00000000"}]'

With 0.17:

error code: -3
error message:
Missing redeemScript

With master/0.18:

{
  "hex": "02000000018a24833c36be23272080d6be8a53e36586b81e0ac447e1298ee58e18cc96bdee0100000000ffffffff0118246bee0000000017a914e139e3904e9e69ecbce87b0fcfb73b1b0e3b9e818700000000",
  "complete": false,
  "errors": [
    {
      "txid": "eebd96cc188ee58e29e147c40a1eb88665e3538abed680202723be363c83248a",
      "vout": 1,
      "witness": [
      ],
      "scriptSig": "",
      "sequence": 4294967295,
      "error": "Witness program was passed an empty witness"
    }
  ]
}