message: mavlink_ftp: no variable size array with MSCV
diff: @@ -34,10 +34,9 @@ void reset_server(std::shared_ptr<MavlinkFTP>& mavlink_ftp)
  void create_test_file(std::string file_name, uint32_t size)
  {
  - char data[size];
  - std::memset(data, 'X', size);
  + std::string str(size, 'X');
  std::ofstream of(file_name, std::fstream::trunc | std::fstream::binary);
  - of.write(data, size);
  + of << str;
  of.close();
  }
  