xfs: fix the comment of xfs_btree_lookup()

Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c
index 0903960..1ecc041 100644
--- a/fs/xfs/xfs_btree.c
+++ b/fs/xfs/xfs_btree.c
@@ -1684,7 +1684,7 @@
 
 /*
  * Lookup the record.  The cursor is made to point to it, based on dir.
- * Return 0 if can't find any such record, 1 for success.
+ * stat is set to 0 if can't find any such record, 1 for success.
  */
 int					/* error */
 xfs_btree_lookup(