message: [Wallet] Clean more pwalletMain wrong usage in wallet_zerocoin.
diff: bool CWallet::AddDeterministicSeed(const uint256& seed)
  {
  - CWalletDB db(pwalletMain->strWalletFile);
  + CWalletDB db(strWalletFile);
  std::string strErr;
  uint256 hashSeed = Hash(seed.begin(), seed.end());
  @@ -56,7 +56,7 @@ bool CWallet::AddDeterministicSeed(const uint256& seed)
  bool CWallet::GetDeterministicSeed(const uint256& hashSeed, uint256& seedOut)
  {
  - CWalletDB db(pwalletMain->strWalletFile);
  + CWalletDB db(strWalletFile);
  std::string strErr;
  if (IsCrypted()) {
  if(!IsLocked()) { //if we have password
  