ChangeLog, badblocks.8.in, badblocks.c:

ChangeLog, badblocks.8.in, badblocks.c:
  badblocks.c: Fix non-destructive read/write patches from David
  	Beattie.  Non-standard variable-length automatic arrays removed.
  	Non-destrutive write test fixed so that logic is clearer and more
  	provably correct.  (I believe the old code had a bug where the disk
  	data wasn't restored if it was interrupted at the wrong time.)
  badblocks.8.in: Document new options in man page.