mm->mean_matrix = mr->mean_vectors;
mm->var_matrix = mr->var_vectors;
- struct substring *var_names = xcalloc (n_vars, sizeof *var_names);
+ struct substring *var_names = XCALLOC (n_vars, struct substring);
for (int i = 0; i < n_vars; ++i)
{
ss_alloc_substring (var_names + i, ss_cstr (var_get_name (vars[i])));