message: Fix clang compile warning
diff: typedef std::vector<uint8_t> valtype;
  typedef std::vector<valtype> stacktype;
  -std::array<uint32_t, 3> flagset{0, STANDARD_SCRIPT_VERIFY_FLAGS,
  - MANDATORY_SCRIPT_VERIFY_FLAGS};
  +std::array<uint32_t, 3> flagset{{0, STANDARD_SCRIPT_VERIFY_FLAGS, MANDATORY_SCRIPT_VERIFY_FLAGS}};
  BOOST_FIXTURE_TEST_SUITE(may152018_opcodes_tests, BasicTestingSetup)
  