message: Fix for asan failures.
diff: @@ -606,6 +606,7 @@ OpSignature GetOpSignature(const OperatorCode* op_code, const Operator* op,
  case BuiltinOperator_ADD: {
  auto add_option = op->builtin_options_as_AddOptions();
  + op_sig.options.addsub.pot_scale_int16 = false;
  if (add_option) {
  op_sig.options.addsub.pot_scale_int16 = add_option->pot_scale_int16();
  }
  @@ -613,6 +614,7 @@ OpSignature GetOpSignature(const OperatorCode* op_code, const Operator* op,
  case BuiltinOperator_SUB: {
  auto sub_option = op->builtin_options_as_SubOptions();
  + op_sig.options.addsub.pot_scale_int16 = false;
  if (sub_option) {
  op_sig.options.addsub.pot_scale_int16 = sub_option->pot_scale_int16();
  }
  