size_t i;
double y;
double tmp;
- union value *tmp_val;
+ const union value *tmp_val;
col = design_matrix_var_to_column (cov, v);
for (i = 0; i < cat_get_n_categories (v) - 1; i++)
size_t col;
size_t i;
double x;
- union value *tmp_val;
+ const union value *tmp_val;
if (var_is_alpha (v1))
{