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: Jiri Pirko <[e-mail]>
Reported-by: Eric Dumazet <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/team/team.c

···
 {
 	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) {