Ignore -mempooltxinputlimit once Overwinter activates

src/wallet/asyncrpcoperation_shieldcoinbase.cpp

@@ -186,6 +186,12 @@ bool AsyncRPCOperation_shieldcoinbase::main_impl() {
 
     // Check mempooltxinputlimit to avoid creating a transaction which the local mempool rejects
     size_t limit = (size_t)GetArg("-mempooltxinputlimit", 0);
+    {
+        LOCK(cs_main);
+        if (NetworkUpgradeActive(chainActive.Height() + 1, Params().GetConsensus(), Consensus::UPGRADE_OVERWINTER)) {
+            limit = 0;
+        }
+    }
     if (limit>0 && numInputs > limit) {
         throw JSONRPCError(RPC_WALLET_ERROR,
             strprintf("Number of inputs %d is greater than mempooltxinputlimit of %d",