message: Fix misaligned nested buffers
diff: @@ -997,6 +997,9 @@ CheckedError Parser::ParseTable(const StructDef &struct_def, std::string *value,
  flexbuffers::BUILDER_FLAG_SHARE_ALL);
  ECHECK(parser->ParseFlexBufferValue(&builder));
  builder.Finish();
  + // Force alignment for nested flexbuffer
  + parser->builder_.ForceVectorAlignment(builder.GetSize(), sizeof(uint8_t),
  + sizeof(largest_scalar_t));
  auto off = parser->builder_.CreateVector(builder.GetBuffer());
  val.constant = NumToString(off.o);
  } else if (field->nested_flatbuffer) {
  @@ -1207,6 +1210,10 @@ CheckedError Parser::ParseNestedFlatbuffer(Value &val, FieldDef *field,
  if (!nested_parser.Parse(substring.c_str(), nullptr, nullptr)) {
  ECHECK(Error(nested_parser.error_));
  }
  + // Force alignment for nested flatbuffer
  + builder_.ForceVectorAlignment(nested_parser.builder_.GetSize(), sizeof(uint8_t),
  + nested_parser.builder_.GetBufferMinAlignment());
  +
  auto off = builder_.CreateVector(nested_parser.builder_.GetBufferPointer(),
  nested_parser.builder_.GetSize());
  val.constant = NumToString(off.o);
  