message: Fixing null case
diff: @@ -1723,9 +1723,11 @@ int CWallet::ScanForWalletTransactions(CBlockIndex *pindexStart, bool fUpdate, b
  // no need to read and scan block, if block was created before
  // our wallet birthday (as adjusted for block time variability)
  // if you are recovering wallet with mnemonics start rescan from block when mnemonics implemented in Zcoin
  - if (fRecoverMnemonic)
  + if (fRecoverMnemonic) {
  pindex = chainActive[chainParams.GetConsensus().nMnemonicBlock];
  - else
  + if (pindex == NULL)
  + pindex = chainActive.Tip();
  + } else
  while (pindex && nTimeFirstKey && (pindex->GetBlockTime() < (nTimeFirstKey - 7200)))
  pindex = chainActive.Next(pindex);
  