MSVC compatibility fixes.

diff --git a/dlls/kernel/kernel_main.c b/dlls/kernel/kernel_main.c
index 1a05ba1..ae43485 100644
--- a/dlls/kernel/kernel_main.c
+++ b/dlls/kernel/kernel_main.c
@@ -19,6 +19,7 @@
  */
 
 #include "config.h"
+#include "wine/port.h"
 
 #include <assert.h>
 #include <ctype.h>