[PATCH] tifm: fix NULL ptr and style

Fix sparse NULL warning;
  drivers/misc/tifm_core.c:223:17: warning: Using plain integer as NULL pointer

Fix style while there.
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/misc/tifm_core.c

@@ -219,8 +219,9 @@ static int tifm_device_remove(struct device *dev)
 	struct tifm_driver *drv = fm_dev->drv;
 
 	if (drv) {
-		if (drv->remove) drv->remove(fm_dev);
-		fm_dev->drv = 0;
+		if (drv->remove)
+			drv->remove(fm_dev);
+		fm_dev->drv = NULL;
 	}
 
 	put_device(dev);