From 6b67a32000dede2d50ac35b540726d2b7d8d17a8 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Thu, 28 Mar 2013 08:30:28 +0000
Subject: [PATCH] Btrfs: pass NULL instead of 0

set_extent_bit()'s (u64 *failed_start) expects NULL not 0.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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Reading git-format-patch failed