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/xen-netfront.c b/drivers/net/xen-netfront.c
index bca37bf..7483d45b 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1073,7 +1073,7 @@
 		if (!xen_feature(XENFEAT_auto_translated_physmap)) {
 			/* Do all the remapping work and M2P updates. */
 			MULTI_mmu_update(mcl, np->rx_mmu, mmu - np->rx_mmu,
-					 0, DOMID_SELF);
+					 NULL, DOMID_SELF);
 			mcl++;
 			HYPERVISOR_multicall(np->rx_mcl, mcl - np->rx_mcl);
 		}