We didn't use the 'usercompr' field before recently.  Unfortunately we didn't
set it to zero either, so there's a lot of file systems out there with it set
to 0x5a.  Deal with that rather than getting confused.
Signed-Off-By: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>