fwcontrol update

[Sean Bruno]

Dieter wrote:
>> len = read(fd, buf, 1024*16);
>>     
>
> It would be good practice to check for read failing.
>   
Indeed it would.  I looked into fwdev.c::fw_read() a little bit and 
documented what I think it's doing as well.

-- 
Sean Bruno
MiraLink Corporation
6015 NE 80th Ave, Ste 100
Portland, OR 97218
Cell 503-358-6832
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MSN: sbruno at miralink.com
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