$NetBSD$

Fix C++ headers.

--- common/video/iso-mpeg4/include/entropy.hpp~	2005-06-17 20:07:56.000000000 +0000
+++ common/video/iso-mpeg4/include/entropy.hpp
@@ -39,8 +39,9 @@ Revision History:
 #ifndef __ENTROPY_HPP_
 #define __ENTROPY_HPP_
 
-#include <istream.h>
-#include <ostream.h>
+#include <istream>
+#include <ostream>
+using namespace std;
 
 class CInBitStream;
 class COutBitStream;
