Store shared pointer to the obstacleRestrictor

dune/solvers/iterationsteps/mmgstep.hh

@@ -57,7 +57,7 @@ public:
     //! Set the obstacle field
     void setObstacles(ObstacleVectorType* obstacles) {obstacles_ = obstacles;}
 
-    ObstacleRestrictor<VectorType>* obstacleRestrictor_;
+    std::shared_ptr<ObstacleRestrictor<VectorType> > obstacleRestrictor_;
 
     //! Bitfield determining which fine grid nodes have an obstacle
     Dune::BitSetVector<dim>* hasObstacle_;