[issue20160] broken ctypes calling convention on MSVC / 64-bit Windows (large structs)

[miss-islington]

Change by miss-islington <mariatta.wijaya+miss-islington at gmail.com>:


----------
pull_requests: +5529

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue20160>
_______________________________________