message: CBase58Data::SetString: cleanse the full vector
  SetString seems to be passing the length of the wrong variable to
  memory_cleanse, resulting in the last byte of the temporary buffer not being
  securely erased.
diff: @@ -198,7 +198,7 @@ bool CBase58Data::SetString(const char* psz, unsigned int nVersionBytes)
  vchData.resize(vchTemp.size() - nVersionBytes);
  if (!vchData.empty())
  memcpy(&vchData[0], &vchTemp[nVersionBytes], vchData.size());
  - memory_cleanse(&vchTemp[0], vchData.size());
  + memory_cleanse(&vchTemp[0], vchTemp.size());
  return true;
  }
  