Btrfs: handle errors in btrfs_orphan_cleanup

If we cannot truncate an inode for some reason we will never delete the orphan
item associated with that inode, which means that we will loop forever in
btrfs_orphan_cleanup.  Instead of doing this just return error so we fail to
mount.  It sucks, but hey it's better than hanging.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 31ade58..c863c84 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4209,7 +4209,7 @@
 		if (IS_ERR(fs_root))
 			err = PTR_ERR(fs_root);
 		else
-			btrfs_orphan_cleanup(fs_root);
+			err = btrfs_orphan_cleanup(fs_root);
 	}
 	return err;
 }