bugfix for mrstlnos

mrstlnos/src/Stress_computation.h

@@ -131,8 +131,8 @@ void strain_stress_x_y_z_at_node(Element *elem, std::vector<gmm::dense_matrix<do
     }
 
     // Extrapolation at node points
-    gmm::dense_matrix<double> values_at_gp(n_gp, 18);
-    gmm::dense_matrix<double> values_at_node(n_n, 18);
+    Eigen::MatrixXd values_at_gp(n_gp, 18);
+    Eigen::MatrixXd values_at_node;
 
     for (size_t i = 0; i < 3; ++i)
         for (size_t j = 0; j < 3; ++j)