message: Do not load external signers wallets when unsupported
  When external signer support is not compiled, do not load external
  signer wallets.
diff: @@ -712,6 +712,13 @@ DBErrors WalletBatch::LoadWallet(CWallet* pwallet)
  }
  }
  +#ifndef ENABLE_EXTERNAL_SIGNER
  + if (pwallet->IsWalletFlagSet(WALLET_FLAG_EXTERNAL_SIGNER)) {
  + pwallet->WalletLogPrintf("Error: External signer wallet being loaded without external signer support compiled\n");
  + return DBErrors::TOO_NEW;
  + }
  +#endif
  +
  // Get cursor
  if (!m_batch->StartCursor())
  {
  