rem: static time_t now = 0; static char idle_hhmm[IDLESTR_LEN]; time_t seconds_idle;
add: static time_t now = TYPE_MINIMUM (time_t);
context: idle_string (time_t when){  static time_t now = 0;  static char idle_hhmm[IDLESTR_LEN];  time_t seconds_idle;  if (now == 0)    time (&now);  seconds_idle = now - when;  if (seconds_idle < 60)	/* One minute. */    return "  .  ";  if (seconds_idle < (24 * 60 * 60))	/* One day. */    {      sprintf (idle_hhmm, "%02d:%02d",	       (int) (seconds_idle / (60 * 60)),	       (int) ((seconds_idle % (60 * 60)) / 60));      return (const char *) idle_hhmm;    }  return _(" old ");}