message: Fix AreOutputsUnique()
  AnonOutputs were never checked for uniqueness
diff: @@ -4543,7 +4543,7 @@ bool CWallet::AreOutputsUnique(CTransaction& txNew)
  {
  const CTxOut& txout = txNew.vout[i];
  - if (txout.IsAnonOutput())
  + if (!txout.IsAnonOutput())
  continue;
  const CScript &s = txout.scriptPubKey;
  