team: init error value to 0 in team_netpoll_setup()

This will ensure correct value is returned in case the port list is empty.
Signed-off-by: NJiri Pirko <jiri@resnulli.us>
Reported-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/team/team.c

@@ -1447,7 +1447,7 @@ static int team_netpoll_setup(struct net_device *dev,
 {
 	struct team *team = netdev_priv(dev);
 	struct team_port *port;
-	int err;
+	int err = 0;
 
 	mutex_lock(&team->lock);
 	list_for_each_entry(port, &team->port_list, list) {