redhat-add_ip.sh: fix a bad typo

Previous git commit 25c14e9647 have a bad bad typo:
proper variable name is VENET_DEV.

Reported-by: Dietmar Maurer <dietmar@maurer-it.com>
Signed-off-by: Dietmar Maurer <dietmar@maurer-it.com>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed