MSVC compatibility fixes.

diff --git a/loader/module.c b/loader/module.c
index 9f40952..854802c 100644
--- a/loader/module.c
+++ b/loader/module.c
@@ -19,6 +19,7 @@
  */
 
 #include "config.h"
+#include "wine/port.h"
 
 #include <assert.h>
 #include <fcntl.h>