From 51a8cf9d2d97017d334f33f1b39067bd2f03bc49 Mon Sep 17 00:00:00 2001
From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Tue, 10 Jul 2012 05:28:38 -0600
Subject: [PATCH] Btrfs: fix btrfs_is_free_space_inode to recognize btree inode

For btree inode, its root is also 'tree root', so btree inode can be
misunderstood as a free space inode.

We should add one more check for btree inode.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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