message: fuzz: Add missing ECC_Start to descriptor_parse test
diff: void initialize()
  {
  static const ECCVerifyHandle verify_handle;
  - SelectParams(CBaseChainParams::REGTEST);
  + ECC_Start();
  + SelectParams(CBaseChainParams::MAIN);
  }
  void test_one_input(const std::vector<uint8_t>& buffer)
  