/*
All variables used in the model.
*/
-int pspp_linreg_get_vars (const void *, struct variable **);
+int pspp_linreg_get_vars (const void *, const struct variable **);
struct pspp_coeff *pspp_linreg_get_coeff (const pspp_linreg_cache
*,
/*
Regression using only the covariance matrix.
*/
-int pspp_linreg_with_cov (const struct design_matrix *, pspp_linreg_cache *);
+void pspp_linreg_with_cov (const struct design_matrix *, pspp_linreg_cache *);
#endif