Update code sample

Author: shaolinfry

bip-0148.mediawiki

@@ -39,7 +39,7 @@ While this BIP is active, all blocks must set the nVersion header top 3 bits to
 <pre>
 // mandatory segwit activation between Oct 1st 2017 and Nov 15th 2017 inclusive
 if (pindex->GetMedianTimePast() >= 1506816000 && pindex->GetMedianTimePast() <= 1510704000 && !IsWitnessEnabled(pindex->pprev, chainparams.GetConsensus())) {
-    if (!((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) && (pindex->nVersion & VersionBitsMask(params, Consensus::DEPLOYMENT_SEGWIT)) != 0) {
+    if (!((pindex->nVersion & VERSIONBITS_TOP_MASK) == VERSIONBITS_TOP_BITS) && (pindex->nVersion & VersionBitsMask(chainparams.GetConsensus(), Consensus::DEPLOYMENT_SEGWIT)) != 0) {
         return state.DoS(0, error("ConnectBlock(): relayed block must signal for segwit, please upgrade"), REJECT_INVALID, "bad-no-segwit");
     }
 }