5910 libnisdb won't build with modern GCC

@@ -20,15 +20,18 @@
  * CDDL HEADER END
  */
 /*
  *      db_dictionary_c.x
  *
+ * Copyright 2015 Gary Mills
  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
  
-%#pragma ident  "%Z%%M% %I%     %E% SMI"
+#if RPC_XDR
+%#include "xdr_nullptr.h"
+#endif /* RPC_XDR */
  
 #if RPC_HDR
 %#ifndef _DB_DICTIONARY_H
 %#define _DB_DICTIONARY_H