Avoid too large shift on LLP64 systems.
Avoid too large shift on LLP64 systems.

This fixes #1562

fabianrost84/cython,da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,ChristopherHogan/cython,ChristopherHogan/cython,fabianrost84/cython,fabianrost84/cython,ChristopherHogan/cython,cython/cython,scoder/cython,fabianrost84/cython,scoder/cython,cython/cython,da-woods/cython,cython/cython,da-woods/cython,fabianrost84/cython