Issue title: [bug #19570] fuse bit verification
 Issue body: Josh <None>
Tue 10 Apr 2007 07:15:09 PM UTC

When verifying fuse bits, avrdude can ignore bits that are not used instead of prompting to 'change back'.  Trying to change back doesn't work.

This issue was migrated from https://savannah.nongnu.org/bugs/?19570
 Comments: 
 Comment 0: Joerg Wunsch <joerg_wunsch>
Tue 10 Apr 2007 08:06:57 PM UTC

Which avrdude version is that?  (Run just "avrdude -v".)

I thought this had been fixed before version 5.3.
 Comment 1: josh <outer_space>
Tue 10 Apr 2007 08:23:15 PM UTC

avrdude: Version 5.3.1, compiled on Apr 10 2007 at 12:36:01
Copyright (c) 2000-2005 Brian Dean, [http://www.bdmicro.com/](https://savannah.nongnu.orghttp://www.bdmicro.com/)
 Comment 2: Colin O  Flynn <c_oflynn>
Wed 02 May 2007 07:41:50 PM UTC

Which AVR device did you see this on and with which programmer? I just wanted to reproduce the problem.

-Colin
 Comment 3: Colin O  Flynn <c_oflynn>
Wed 02 May 2007 08:46:08 PM UTC

Thanks to a tip from Joerg, am able to reproduce the problem.
 Comment 4: Colin O  Flynn <c_oflynn>
Wed 02 May 2007 11:06:00 PM UTC

This might be fixed now - it's in CVS. If you could try and let me know it would be appreciated.

-Colin
 Comment 5: Joerg Wunsch <joerg_wunsch>
Wed 16 May 2007 08:17:40 PM UTC

Please verify this is fixed now.
 Comment 6: Joerg Wunsch <joerg_wunsch>
Mon 29 Oct 2007 10:09:15 PM UTC

Timed out getting feedback, assumed the fix is working.
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