[LinuxBIOS] util/getpir 64bit cleanup

[Jeremy Jackson]

I'm guessing nobody has tried compiling it with 64bit userspace?

Patch makes it compile cleanly and stops a "SEGV instead of working"
issue.

I also added a few checks for errors on system calls.

-- 
Jeremy Jackson
jerj at coplanar.net Email/Jabber/Google Talk/MSN
(519)489-4903
Coplanar Networks
http://www.coplanar.net
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