message: Hardcode min ring size=1 till V3 fork
  Existing implementation is faulty
diff: @@ -3238,7 +3238,7 @@ bool CWallet::ProcessAnonTransaction(CWalletDB *pwdb, CTxDB *ptxdb, const CTrans
  };
  int nRingSize = txin.ExtractRingSize();
  - if (nRingSize < (Params().IsProtocolV3(nBestHeight) ? 1 : (int)MIN_RING_SIZE)
  + if (nRingSize < 1
  ||nRingSize > (Params().IsProtocolV3(nBestHeight) ? (int)MAX_RING_SIZE : (int)MAX_RING_SIZE_OLD))
  return error("%s: Input %d ringsize %d not in range [%d, %d].", __func__, i, nRingSize, MIN_RING_SIZE, MAX_RING_SIZE);
  