Fix for issue #1902 Applied patch: matplotlib/matplotlib/commit/a9155…

[wiredfool]

Applied patch: matplotlib/matplotlib@a91559b to fix issue #1902
Changes proposed in this pull request:

• Use PyLong_AsVoidPtr instead of converting a pyint to a py_ssizet, which misses the top half of the address space on 32 bit machines.

[wiredfool]

Tests: I can't find a way to trigger this in a 32 bit docker image on a 64 bit machine -- it requires a 32 bit vm at the very least, and it's only getting triggered on Debian, not Ubuntu in my testing.

This fix does work on the 32 bit Debian vm.

Waiting on #2368

[wiredfool]

Pypy 5.6 is segfaulting in _imagingtk.c:_tkinit:

    /* This will bomb if interp is invalid... */
    TkImaging_Init(interp);

It's consistent back to 2.5.0, which is well before the Tk reorg.