From: Jan Kara <jack@ucw.cz>

Fix a problem in the old quota format when we tried to read quota
information after the end of quota file (that is correct as it might a user
with sufficiently large UID which has no limits or usage).
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>