atm: nicstar: use NULL instead of 0 for pointer

sparse says:

drivers/atm/nicstar.c:642:27: warning:
 Using plain integer as NULL pointer
drivers/atm/nicstar.c:644:27:
 warning: Using plain integer as NULL pointer
drivers/atm/nicstar.c:982:51:
 warning: Using plain integer as NULL pointer
drivers/atm/nicstar.c:996:51:
 warning: Using plain integer as NULL pointer

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Acked-by: Chas Williams <chas@cmf.nrl.navy.mil>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/atm/nicstar.c b/drivers/atm/nicstar.c
index 9587e959ce1a..13ed54cf2c31 100644
--- a/drivers/atm/nicstar.c
+++ b/drivers/atm/nicstar.c
@@ -639,9 +639,9 @@ static int ns_init_card(int i, struct pci_dev *pcidev)
         card->hbnr.init = NUM_HB;
         card->hbnr.max = MAX_HB;
 
-        card->sm_handle = 0x00000000;
+        card->sm_handle = NULL;
         card->sm_addr = 0x00000000;
-        card->lg_handle = 0x00000000;
+        card->lg_handle = NULL;
         card->lg_addr = 0x00000000;
 
         card->efbie = 1;        /* To prevent push_rxbufs from enabling the interrupt */
@@ -979,7 +979,7 @@ static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
                                 addr2 = card->sm_addr;
                                 handle2 = card->sm_handle;
                                 card->sm_addr = 0x00000000;
-                                card->sm_handle = 0x00000000;
+                                card->sm_handle = NULL;
                         } else {        /* (!sm_addr) */
 
                                 card->sm_addr = addr1;
@@ -993,7 +993,7 @@ static void push_rxbufs(ns_dev * card, struct sk_buff *skb)
                                 addr2 = card->lg_addr;
                                 handle2 = card->lg_handle;
                                 card->lg_addr = 0x00000000;
-                                card->lg_handle = 0x00000000;
+                                card->lg_handle = NULL;
                         } else {        /* (!lg_addr) */
 
                                 card->lg_addr = addr1;