update license in source code itself

win32/direct.cpp

@@ -1,4 +1,14 @@
-// ddraw
+/*
+ * (C) Gražvydas "notaz" Ignotas, 2009
+ *
+ * This work is licensed under the terms of any of these licenses
+ * (at your option):
+ *  - GNU GPL, version 2 or later.
+ *  - GNU LGPL, version 2.1 or later.
+ *  - MAME license.
+ * See the COPYING file in the top-level directory.
+ */
+
 #include <ddraw.h>
 #include "../lprintf.h"
 #include "direct.h"