LIBCDIO_CONFIG_H -> EXTERNAL_LIBCDIO_CONFIG_H so we don't get conflicting

includes with the local config.h.

include/cdio/types.h

@@ -1,5 +1,5 @@
 /*
-    $Id: types.h,v 1.34 2006/01/21 12:02:55 rocky Exp $
+    $Id: types.h,v 1.35 2006/01/23 20:47:33 rocky Exp $
 
     Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>
     Copyright (C) 2002, 2003, 2004, 2005, 2006
@@ -32,8 +32,8 @@
 extern "C" {
 #endif /* __cplusplus */
 
-#ifndef LIBCDIO_CONFIG_H
-#define LIBCDIO_CONFIG_H
+#ifndef EXTERNAL_LIBCDIO_CONFIG_H
+#define EXTERNAL_LIBCDIO_CONFIG_H
 #include <cdio/cdio_config.h>
 #endif