const struct caseproto *proto = casereader_get_proto (input);
size_t rank_idx = caseproto_get_n_widths (proto);
- struct mw *mw = xcalloc (nst->n_vars, sizeof *mw);
+ struct mw *mw = XCALLOC (nst->n_vars, struct mw);
for (i = 0; i < nst->n_vars; ++i)
{