Fix mingw build

Mingw builds on Travis were failing because INT_MAX was undeclared.
Reviewed-by: NRich Salz <rsalz@openssl.org>

crypto/LPdir_win.c

@@ -35,6 +35,7 @@
 
 #include <windows.h>
 #include <tchar.h>
+#include "internal/numbers.h"
 #ifndef LPDIR_H
 # include "LPdir.h"
 #endif