w1: silence an uninitialized variable warning

If kstrtoint() returns -ERANGE then "tmp" is uninitialized.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NEvgeniy Polaykov <zbr@ioremap.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/w1.c

@@ -335,7 +335,7 @@ static ssize_t w1_master_attribute_store_max_slave_count(struct device *dev,
 	int tmp;
 	struct w1_master *md = dev_to_w1_master(dev);
 
-	if (kstrtoint(buf, 0, &tmp) == -EINVAL || tmp < 1)
+	if (kstrtoint(buf, 0, &tmp) || tmp < 1)
 		return -EINVAL;
 
 	mutex_lock(&md->mutex);