Fixed some issues found by winapi_check.

diff --git a/tools/bin2res.c b/tools/bin2res.c
index 912ba8f..b121da0 100644
--- a/tools/bin2res.c
+++ b/tools/bin2res.c
@@ -23,7 +23,9 @@
 
 #include <fcntl.h>
 #include <unistd.h>
-#include <sys/mman.h>
+#ifdef HAVE_SYS_MMAN_H
+# include <sys/mman.h>
+#endif
 #include "winuser.h"
 
 extern char*   g_lpstrFileName;