Removed dependency on unistd.h for MSVC in apps
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 70ba622..a3e9f2b 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -28,7 +28,14 @@
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
+
+#if !defined(_MSC_VER) || defined(EFIX64) || defined(EFI32)
#include <unistd.h>
+#else
+#include <io.h>
+#define read _read
+#define write _write
+#endif
#if defined(_WIN32) || defined(_WIN32_WCE)