Try to fix the tests on OpenBSD. Apparently OpenBSD passes
structure parameters differently than other posix-like systems.
diff --git a/Modules/_ctypes/libffi/src/x86/ffi.c b/Modules/_ctypes/libffi/src/x86/ffi.c
index e4d5fc3..7bd5c69 100644
--- a/Modules/_ctypes/libffi/src/x86/ffi.c
+++ b/Modules/_ctypes/libffi/src/x86/ffi.c
@@ -121,7 +121,7 @@
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
-#ifndef X86_WIN32
+#if !defined(X86_WIN32) && !defined(__OpenBSD__)
case FFI_TYPE_STRUCT:
#endif
case FFI_TYPE_SINT64:
@@ -135,7 +135,7 @@
cif->flags = FFI_TYPE_SINT64;
break;
-#ifdef X86_WIN32
+#if defined(X86_WIN32) || defined(__OpenBSD__)
case FFI_TYPE_STRUCT:
if (cif->rtype->size == 1)
{