message: Use `QByteArray` comparisons in `ValidPassword()`
  In the `ValidPassword()` function, compare the `QByteArrays` directly, instead of calling the `.data()` function.
diff: @@ -101,7 +101,7 @@ bool AdminDatabase::ValidPassword(const char *username, const char *password)
  QByteArray passb = m_prepared_select_account_passw.value("passw").toByteArray();
  QByteArray salt = m_prepared_select_account_passw.value("salt").toByteArray();
  QByteArray hashed_password = hasher.hashPassword(password, salt);
  - if (memcmp(passb.data(),hashed_password.data(),passb.size()) == 0)
  + if (memcmp(passb,hashed_password,passb.size()) == 0)
  res = true;
  return res;
  }
  