Write a small test to test possible crash

This small test prove a that current generated demarshaller code
is not safe to integer overflows leading to buffer overflows.
Actually from a quick look at the protocol it seems that client
can't cause these overflows but server can quite easily at
demonstrated by this test.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Jonathon Jongsma <jjongsma@redhat.com>