[Cython] Potential 32bit linux issue

[Dieter Vandenbussche]

Hi, this is my first time posting to this list, hopefully i'm not wasting
anyone's time.

i believe i may have encountered an issue on 32bit linux using cython.

Here's a small example pyx file that illustrates the potential issue:

#Begin pyx file
cdef extern from "stdint.h":
    enum: INT64_MIN

cpdef f():
    cdef long long x = INT64_MIN
    print x
    print INT64_MIN
#End pyx file

The first print statement works as expected, the second does not (and
prints "0").  Looking at the C code that was generated, it looks like
the second print statement is resulting in a call to PyInt_FromLong, which
I believe might be the source of an overflow.

Thanks for taking the time to take a look.

dieter
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