In wireshark commit ceb8d954 (v1.99.2) they have changed the
signature of a function that determines how long a libvirt packet
is. Now it accepts a void pointer for passing data into the
function. Well, this is nice, but we don't need it right now.
Anyway, we have to change our code.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
(cherry picked from commit 4f477785915fcbf0c5d02463e3bd7f47646074a8)