vzmigrate: suppress error from kill -0

kill -0 $pid is used to check if the $pid is still there,
and if not we error out with an appropriate message.
It doesn't make sense to show an error from kill:

	kill: (1235) - No such process

so let's suppress it.

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed