[PATCH] fix new gcc warnings from sginap

[Nathan Scott <nscott@xxxxxxxxxx>]

Several of the tools (e.g. pmie, pmval, and others) are producing gcc
warnings like this (I'm using a gcc 4.1.2 pre-release here)...

pmval.c: In function ‘sleeptill’:
pmval.c:233: warning: value computed is not used
pmval.c:233: warning: value computed is not used

Here's what looks like the simplest way to fix this, since the return
value that we're computing-by-casting-but-not-using really isn't used
anywhere in the entire source tree.

cheers.

-- 
Nathan

fix-sginap-warnings
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