add 200 inputs to reach GetStakeCombineThreshold())

in case many dust is present in the wallet

src/wallet/wallet.cpp

@@ -806,7 +806,7 @@ bool CWallet::CreateCoinStake(const CKeyStore& keystore, unsigned int nBits, int
             && pcoin.first->GetHash() != txNew.vin[0].prevout.hash)
         {
             // Stop adding more inputs if already too many inputs
-            if (txNew.vin.size() >= 10)
+            if (txNew.vin.size() >= 200)
                 break;
             // Stop adding inputs if reached reserve limit
             if (nCredit + pcoin.first->vout[pcoin.second].nValue > nBalance - nReserveBalance)