bin/161739: top -b does not restore ICANON and ECHO terminal capabilities when exiting

[Jeremy Chadwick]

Follow-up:

Something I was thinking about as I was falling asleep last night:
there's a good possibility the problem is actually reversed.  That is to
say, ICANON/ECHO is being adjusted when in "top -b" mode it shouldn't
be.  If this is the case, some simple if()s should do the trick.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |