Use setter to set obstacles in QuadraticIpOpt

dune/solvers/iterationsteps/mmgstep.cc

@@ -82,7 +82,7 @@ preprocess()
 
         QuadraticIPOptSolver<MatrixType,VectorType>* ipoptBaseSolver = dynamic_cast<QuadraticIPOptSolver<MatrixType,VectorType>*> (this->basesolver_.get());
 
-        ipoptBaseSolver->obstacles_ = obstacleHierarchy_[0];
+        ipoptBaseSolver->setObstacles(*obstacleHierarchy_[0]);
 #endif
     } else {
         DUNE_THROW(SolverError, "You can't use " << typeid(*this->basesolver_).name()

dune/solvers/test/quadraticipoptsolvertest.cc

@@ -41,7 +41,7 @@ void solveObstacleProblemByQuadraticIPOptSolver(const GridType& grid, const Matr
     // create solver
     Solver solver(mat,x,rhs, NumProc::REDUCED);
     solver.setIgnore(ignore);
-    solver.obstacles_ = &boxConstraints;
+    solver.setObstacles(boxConstraints);
     // solve problem
     solver.solve();
 }