net/ethernet: ks8851_mll: signedness bug in ks8851_probe()

netdev->irq is unsigned, so it's never less than zero.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Tested-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/micrel/ks8851_mll.c

@@ -1545,7 +1545,7 @@ static int __devinit ks8851_probe(struct platform_device *pdev)
 
 	netdev->irq = platform_get_irq(pdev, 0);
 
-	if (netdev->irq < 0) {
+	if ((int)netdev->irq < 0) {
 		err = netdev->irq;
 		goto err_get_irq;
 	}