message: fuzz: check that certain script TxoutType are nonstandard
diff: @@ -71,7 +71,15 @@ FUZZ_TARGET_INIT(script, initialize_script)
  (void)IsSolvable(signing_provider, script);
  TxoutType which_type;
  - (void)IsStandard(script, which_type);
  + bool is_standard_ret = IsStandard(script, which_type);
  + if (!is_standard_ret) {
  + assert(which_type == TxoutType::NONSTANDARD ||
  + which_type == TxoutType::NULL_DATA ||
  + which_type == TxoutType::MULTISIG);
  + }
  + if (which_type == TxoutType::NONSTANDARD) {
  + assert(!is_standard_ret);
  + }
  if (which_type == TxoutType::NULL_DATA) {
  assert(script.IsUnspendable());
  }
  