[NET]: Nicer WARN_ON in netstat_show

The

        if (statement)
                WARN_ON(1);

looks much better as

        WARN_ON(statement);
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/net-sysfs.c

@@ -247,9 +247,8 @@ static ssize_t netstat_show(const struct device *d,
 	struct net_device_stats *stats;
 	ssize_t ret = -EINVAL;
 
-	if (offset > sizeof(struct net_device_stats) ||
-	    offset % sizeof(unsigned long) != 0)
-		WARN_ON(1);
+	WARN_ON(offset > sizeof(struct net_device_stats) ||
+			offset % sizeof(unsigned long) != 0);
 
 	read_lock(&dev_base_lock);
 	if (dev_isalive(dev) && dev->get_stats &&