message: allow overriding FLATBUFFERS_MAX_ALIGNMENT
diff: @@ -329,7 +329,9 @@ typedef uintmax_t largest_scalar_t;
  #define FLATBUFFERS_MAX_BUFFER_SIZE ((1ULL << (sizeof(::flatbuffers::soffset_t) * 8 - 1)) - 1)
  // We support aligning the contents of buffers up to this size.
  +#ifndef FLATBUFFERS_MAX_ALIGNMENT
  #define FLATBUFFERS_MAX_ALIGNMENT 16
  +#endif
  /// @brief The length of a FlatBuffer file header.
  static const size_t kFileIdentifierLength = 4;
  