Bug in ip_tos.c use of libnet_build_ethernet()

As I struggled with libnet_build_ethernet(), I found that it's used incorrectly in sample/ip_tos.c.  That file includes:

   char *hwdst = "22:22:22:22:22:22" ...;
   ...
   eth_ptag = libnet_build_ethernet(
        hwdst,
        ...);

but the first two arguments to libnet_build_ethernet() aren't strings, they are arrays of 6 bytes.  The above code leads to a packet that has a destination MAC address of 32:32:3a:32:32:3a because '2' is 0x32 and ':' is 0x3a and libnet_build_ethernet() looks at the first 6 bytes ( "22:22:") and treats them as uint8_t, not characters.

Is there somewhere I can log this error besides this mailing list?