fix for acqui opt w grads

src/limbo/stat/gp.hpp

@@ -80,7 +80,7 @@ namespace limbo {
                     point[dim_in] = x;
                     if (dim_in == current.size() - 1) {
                         auto q = bo.model().query(point);
-                        double acqui = std::get<0>(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(point, afun, false));
+                        double acqui = opt::fun(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(point, afun, false));
                         ofs << point.transpose() << " "
                             << std::get<0>(q).transpose() << " "
                             << std::get<1>(q) << " "

src/limbo/stat/gp_acquisitions.hpp

@@ -71,11 +71,11 @@ namespace limbo {
 
                 if (!blacklisted && !bo.samples().empty()) {
                     std::tie(mu, sigma) = bo.model().query(bo.samples().back());
-                    acqui = std::get<0>(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(bo.samples().back(), afun, false));
+                    acqui = opt::fun(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(bo.samples().back(), afun, false));
                 }
                 else if (!bo.bl_samples().empty()) {
                     std::tie(mu, sigma) = bo.model().query(bo.bl_samples().back());
-                    acqui = std::get<0>(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(bo.bl_samples().back(), afun, false));
+                    acqui = opt::fun(typename BO::acquisition_function_t(bo.model(), bo.current_iteration())(bo.bl_samples().back(), afun, false));
                 }
                 else
                     return;