ChangeLog, badblocks.c:

ChangeLog, badblocks.c:
  badblocks.c (test_nd): Significantly simplify the logic so that it's
  	more obviously what's going on.  Fixed a few potential cases which
  	weren't handled correctly in the old, overly complicated logic.
  	(flush_bufs): Now doesn't take a second argument, and always forces a
  	sync; this is required before it's really safe to call BLKFLSBUF, at
  	least for some kernels.