/* Value for dist[j-1][i-1] (one row up, one col left). */
ed_dist diagdist = dist[0];
dist[0] = dist[0] + ED_INS_COST(tgt[j - 1]);
/* Value for dist[j-1][i-1] (one row up, one col left). */
ed_dist diagdist = dist[0];
dist[0] = dist[0] + ED_INS_COST(tgt[j - 1]);