Update doip-payload-0005.c
Update doip-payload-0005.c

Fixed the snprintf command, because is generates errors in the appveyor windows build.
Now an ifdef is provided to differ between Linux and Windows. On Windows it now just sets the message, that it is unimplemented (wich is no problem so far because it is almost a debug output)

AMOS-ss16-proj3/amos-ss16-proj3,AMOS-ss16-proj3/amos-ss16-proj3,AMOS-ss16-proj3/amos-ss16-proj3,darki2002/amos-ss16-proj3,darki2002/amos-ss16-proj3,AMOS-ss16-proj3/amos-ss16-proj3,AMOS-ss16-proj3/amos-ss16-proj3