Use correct types for OpenSSL and Windows APIs

Use correct types for OpenSSL and Windows APIs

The error code of OpenSSL is a long. On most Unics systems
(mac, Linux...) this happens to be the same as size_t. But on Windows
as LP64, long is a 32 bit type and size_t is a 64 bit type. So use the
same type as OpenSSL.

When calling the Windows API use DWORD for the functions that want a
DWORD.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20210324222330.455-4-arne@rfc2549.org>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg21803.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>