chfs_change_size_unchecked
void chfs_change_size_unchecked(struct chfs_mount *,
chfs_change_size_unchecked(chmp, cheb, -unchecked);
chfs_change_size_unchecked(chmp, cheb, -len);
chfs_change_size_unchecked(chmp, &chmp->chm_blocks[nref->nref_lnr], -totlen);
chfs_change_size_unchecked(chmp, cheb, dnode->length);