message: Make compile work on GCC 10.1
diff: @@ -12,6 +12,7 @@ see protocol.md for the protocol specification
  #include <limits>
  #include <cmath>
  //#include <stdint.h>
  +#include <stdio.h>
  #include <string.h>
  #include "crc.hpp"
  #include "cpp_utils.hpp"
  