dm-buffered: don't check for NULL when calling kfree

kfree checks the pointer for NULL, no need to check it in the caller.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

---
 drivers/md/dm-buffered-target.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Index: linux-2.6/drivers/md/dm-buffered-target.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-buffered-target.c
+++ linux-2.6/drivers/md/dm-buffered-target.c
@@ -554,8 +554,7 @@ static void buffered_dtr(struct dm_targe
 		dm_bufio_client_destroy(bc->bufio);
 	if (bc->dev)
 		dm_put_device(ti, bc->dev);
-	if (bc->table_line)
-		kfree(bc->table_line);
+	kfree(bc->table_line);
 	kfree(bc);
 }