[issue26423] Integer overflow in wrap_lenfunc() on 64-bit build of Windows with len > 2**31-1

[Eryk Sun]

Eryk Sun added the comment:

mmap.mmap(-1, 2**31 + 5) could be used here. If the pages are never touched it 
won't increase the working set size. It merely maps the address range with 
demand-zero pages.

Unpatched:

    >>> mmap.mmap(-1, 2**31 + 5).__len__()
    -2147483643

Patched:

    >>> mmap.mmap(-1, 2**31 + 5).__len__()
    2147483653L

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nosy: +eryksun

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