3154 Nonconforming tolower and toupper with UTF-8 locales

*** 159,168 ****
--- 159,169 ----
  }
  
  /*
   * This is used for 8-bit encodings.
   */
+ /* ARGSUSED */
  int
  towide_none(wchar_t *c, const char *mb, unsigned n)
  {
          _NOTE(ARGUNUSED(n));