[issue5933] fix gcc -Wextra warnings (compare signed/unsigned)

[Mark Dickinson]

Mark Dickinson <dickinsm at gmail.com> added the comment:

Applied in r72479, r72481, r72482, r72483.

As a side note, I'm not 100% convinced of the correctness of the resource_setrlimit code.  If rlim_t is smaller than an unsigned long then input values might be wrapped to a smaller 
value (by the implicit long -> rlim_t conversion) when they should be signaling 
OverflowError instead.  Perhaps there should be a bunch of PySAFE_DOWNCASTs here?

Or maybe rlim_t is never smaller than a long in practice.

About RLIM_INFINITY:  I can't find it documented anywhere that RLIM_INFINITY is (rlim_t)-1, 
though I dare say that's true on many platforms.  Still, it doesn't seem like a safe 
assumption.

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resolution:  -> fixed
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5933>
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