I've observed that ext3_htree_fill_tree() doesn't ignore empty records
(de->inode == 0).  test case is very simple: turn htree on, create several
hundreds of files, remove them and look at strace ls:

[root@victim tests]# ls -a /test/1
.  ..

[root@victim tests]# strace ls /test/1/
....
getdents64(3, /* 18 entries */, 4096)   = 432
getdents64(3, /* 0 entries */, 4096)    = 0
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>