the _num_chars() function is not used, removing

  return Curl_inet_ntop(af, af == AF_INET ? ip4 : ip6, buf, bufsize);

}

/*

 * Count the number of characters that an integer would use in a string

 * (base 10).

 */

static int _num_chars(int i)

{

  int chars = 0;

  /* While the number divided by 10 is greater than one,

   * re-divide the number by 10, and increment the number of

   * characters by 1.

   *

   * this relies on the fact that for every multiple of 10,

   * a new digit is added onto every number

   */

  do {

    chars++;

    i = (int) i / 10;

  } while (i >= 1);

  return chars;

}

/*

 * Return a hostcache id string for the providing host + port, to be used by

 * the DNS caching.