cg_blktot
if (cg_blktot(&acg)[i] == 0)
printf(" c%d:\t(%d)\t", i, cg_blktot(&acg)[i]);
cg_blktot(&acg)[cbtocylno(&sblock, d)]++;
cg_blktot(&acg)[cbtocylno(&sblock, d)]++;
cg_blktot(&acg)[cbtocylno(&sblock, d)]--;
cg_blktot(cgp)[cylno]--;
cg_blktot(cgp)[i]++;
cg_blktot(cgp)[i]++;