NULL noise in drivers/net

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index 2bacb5e..14299f8 100644
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -5085,7 +5085,7 @@
 
 	/* give us access to cassini registers */
 	cp->regs = pci_iomap(pdev, 0, casreg_len);
-	if (cp->regs == 0UL) {
+	if (!cp->regs) {
 		dev_err(&pdev->dev, "Cannot map device registers, aborting.\n");
 		goto err_out_free_res;
 	}