[SCSI] qla2xxx: use NULL instead of 0

Use NULL instead of 0 for pointers (sparse warning):
drivers/scsi/qla2xxx/qla_attr.c:393:4: warning: Using plain integer as NULL pointer
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -390,7 +390,7 @@ static struct sysfs_entry {
 	{ "optrom_ctl", &sysfs_optrom_ctl_attr, },
 	{ "vpd", &sysfs_vpd_attr, 1 },
 	{ "sfp", &sysfs_sfp_attr, 1 },
-	{ 0 },
+	{ NULL },
 };
 
 void