message: [Wallet] Don't attempt automint if zerocoin isn't active
  Since the activation of the zerocoin protocol is controlled by a
  spork/timestamp, limit automint to respect the activation time. This
  avoids unnecessary and ultimately rejected transactions.
diff: @@ -3426,6 +3426,8 @@ bool CWallet::GetDestData(const CTxDestination& dest, const std::string& key, st
  // CWallet::AutoZeromint() gets called with each new incoming block
  void CWallet::AutoZeromint()
  {
  + // Don't bother Autominting if Zerocoin Protocol isn't active
  + if (!IsSporkActive(SPORK_17_ENABLE_ZEROCOIN)) return;
  // Wait until blockchain + masternodes are fully synced and wallet is unlocked.
  if (!masternodeSync.IsSynced() || IsLocked()){
  