-covariance_2pass_create (size_t n_vars, const struct variable **vars,
- size_t n_catvars, const struct variable **catvars,
- const struct variable *weight, enum mv_class excl);
+covariance_2pass_create (size_t n_vars, const struct variable *const *vars,
+ struct categoricals *cats,
+ const struct variable *wv, enum mv_class excl);