Fix windows clang+vcpkg build.

src/cdrom/cdrom_image_backend.c

@@ -27,6 +27,7 @@
 #include <string.h>
 #ifdef _WIN32
 #    include <string.h>
+#    include <sys/types.h>
 #else
 #    include <libgen.h>
 #endif

src/cdrom/cdrom_image_viso.c

@@ -38,6 +38,10 @@
 #include <86box/nvr.h>
 // clang-format on
 
+#ifndef S_ISDIR
+#    define S_ISDIR(m) (((m) &S_IFMT) == S_IFDIR)
+#endif
+
 #define VISO_SKIP(p, n)     \
     {                       \
         memset(p, 0x00, n); \

src/include/86box/plat.h

@@ -76,6 +76,10 @@ extern "C" {
 #    define atomic_bool_t atomic_bool
 #endif
 
+#if defined(_MSC_VER)
+#    define ssize_t intptr_t
+#endif
+
 /* Global variables residing in the platform module. */
 extern int dopause,          /* system is paused */
     mouse_capture;           /* mouse is captured in app */