9083 replace regex implementation with tre

*** 1642,1652 ****
          *dstp = dst = (wchar_t *)malloc(len * sizeof (wchar_t));
          if (dst == NULL)
                  return (REG_ESPACE);
  
          if (rp == NULL || rpl == NULL || src == NULL || dst ==  NULL)
!                 return (REG_EFATAL);
  
          glob = 0;       /* match count */
          ip = src;       /* source position */
          op = dst;       /* destination position */
          end = dst + len;
--- 1642,1652 ----
          *dstp = dst = (wchar_t *)malloc(len * sizeof (wchar_t));
          if (dst == NULL)
                  return (REG_ESPACE);
  
          if (rp == NULL || rpl == NULL || src == NULL || dst ==  NULL)
!                 return (REG_BADPAT);
  
          glob = 0;       /* match count */
          ip = src;       /* source position */
          op = dst;       /* destination position */
          end = dst + len;