hists__calc_col_len
hists__calc_col_len(&c2c_hists->hists, &c2c_he->he);
hists__calc_col_len(hists, he);
hists__calc_col_len(hists, n);
hists__calc_col_len(hists, h);
hists__calc_col_len(hists, n);
void hists__calc_col_len(struct hists *hists, struct hist_entry *he);