Avoid unneeded 32/64-bit differences.
Avoid unneeded 32/64-bit differences.

This fixes #1763.

da-woods/cython,cython/cython,da-woods/cython,da-woods/cython,cython/cython,scoder/cython,ChristopherHogan/cython,cython/cython,ChristopherHogan/cython,scoder/cython,cython/cython,scoder/cython,da-woods/cython,ChristopherHogan/cython,scoder/cython