5910 libnisdb won't build with modern GCC

*** 17,41 ****
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
   * This is a non-recursive version of XDR routine used for db_index_entry
   * type.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/types.h>
  #include <sys/syslog.h>
  #include <stdio.h>
  #include <rpc/types.h>
  #include <rpc/xdr.h>
  #include <memory.h>
  #include "db_index_entry_c.h"
  #include "db_table_c.h"
  
  bool_t
  xdr_db_index_entry(xdrs, objp)
          register XDR *xdrs;
          db_index_entry *objp;
--- 17,45 ----
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
+ 
  /*
+  * Copyright 2015 Gary Mills
+  */
+ 
+ /*
   * This is a non-recursive version of XDR routine used for db_index_entry
   * type.
   */
  
  #include <sys/types.h>
  #include <sys/syslog.h>
  #include <stdio.h>
  #include <rpc/types.h>
  #include <rpc/xdr.h>
  #include <memory.h>
  #include "db_index_entry_c.h"
  #include "db_table_c.h"
+ #include "xdr_nullptr.h"
  
  bool_t
  xdr_db_index_entry(xdrs, objp)
          register XDR *xdrs;
          db_index_entry *objp;