Fix an uncorrect function prototype. Will backport to release23-maint.
Fix an uncorrect function prototype.
Will backport to release23-maint.

BTW: Shouldn't it read PY_LONG_LONG instead of 'long long' ?

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator