rem: get_s2_spec_stats (struct Spec_list *s2, size_t len_s1)
add: get_s2_spec_stats (struct Spec_list *s2, count len_s1)
context: get_s2_spec_stats (struct Spec_list *s2, size_t len_s1){  get_spec_stats (s2);  if (len_s1 >= s2->length && s2->n_indefinite_repeats == 1)    {      s2->indefinite_repeat_element->u.repeated_char.repeat_count =	len_s1 - s2->length;      s2->length = len_s1;    }}