Fix os_win32 build

Addition of os_memcmp_const() in commit
afc3c8b07ffcdccc9349c83dfd3cc904ad9fbfb1 had forgotten to include
common.h into os_win32.c to get u8 defined.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/utils/os_win32.c

@@ -12,6 +12,7 @@
 #include <wincrypt.h>
 
 #include "os.h"
+#include "common.h"
 
 void os_sleep(os_time_t sec, os_time_t usec)
 {