With the current multiplication we might end up with 19999 as
time on i386. When we round it ends up as 20000 on i386 and
should work the same on AMD64.
This patch extends the test_messages test to show the number of dummy
packets that has been passed to sendto(). This way, dummy packets are
even being counted when sendto() itself failes (e.g. due to the fd
being -1).
Sponsored-by: On-Waves ehf