NTFS: Fix fs/ntfs/aops.c::ntfs_{read,write}_block() to handle the case

      where a concurrent truncate has truncated the runlist under our feet.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

diff --cc fs/ntfs/ChangeLog
Simple merge

diff --cc fs/ntfs/aops.c
Simple merge