cffi-tests: don't use stdcall #ifndef WIN32
cffi-tests: don't use stdcall #ifndef WIN32

marsijanin/cffi,kingcheez/cffi-cheez,dkochmanski/cffi,dochang/cffi,kingcheez/cffi-cheez,dkochmanski/cffi,cffi/cffi,3b/cffi,attila-lendvai/cffi,dochang/cffi,marsijanin/cffi,akovalenko/cffi,stassats/cffi,cffi/cffi,kingcheez/cffi-cheez,dochang/cffi,mcna/cffi,dkochmanski/cffi,cffi/cffi,3b/cffi,marsijanin/cffi,3b/cffi,akovalenko/cffi,stassats/cffi,wesen/cffi,stassats/cffi,mcna/cffi,attila-lendvai/cffi,wesen/cffi,akovalenko/cffi,wesen/cffi