Clear witness with vin/vout in CWallet::CreateTransaction()

src/wallet/wallet.cpp

@@ -2209,6 +2209,7 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                 nChangePosInOut = nChangePosRequest;
                 txNew.vin.clear();
                 txNew.vout.clear();
+                txNew.wit.SetNull();
                 wtxNew.fFromMe = true;
                 bool fFirst = true;