xen/events: drop negativity check of unsigned parameter
xen/events: drop negativity check of unsigned parameter

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80531
Reported-by: David Binderman <b6d239d25020cc5e235b79047ed71f02d7363ad6@hotmail.com>
Signed-off-by: Andrey Utkin <261da76fe9d2fe2e8bdc22049270af0a9f189e33@gmail.com>
Signed-off-by: David Vrabel <b9d45bd1f671e508cd8daa63dfc3cabb597562df@citrix.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs