Fixed oops after failed netlink socket creation.
Wrong parathenses in if() statement caused err to be 1,
instead of negative value.
Trivial fix, not trivial to find though.

Signed-Off-By: Dmitry Mishin <dim@sw.ru>
Signed-Off-By: Kirill Korotaev <dev@openvz.org>

Kirill
P.S. against 2.6.15