lib1513: fix callback proto to silence warning

#include "memdebug.h"

static int progressKiller(void *arg)

static int progressKiller(void *arg,

                          double dltotal,

                          double dlnow,

                          double ultotal,

                          double ulnow)

{

  (void)arg;

  (void)dltotal;

  (void)dlnow;

  (void)ultotal;

  (void)ulnow;

  return 1;

}