make the backend solver directly accessible in ProblemStat

amdis/ProblemStat.hpp

@@ -79,7 +79,7 @@ namespace AMDiS
     using PartitionSet = typename LinAlgTraits::PartitionSet;
 
   public:
-    using LinearSolver = LinearSolverInterface<Mat,Vec,Vec>;
+    using LinearSolver = AMDiS::LinearSolver<Mat,Vec,Vec>;
     using SystemMatrix = BiLinearForm<GlobalBasis, GlobalBasis, typename Traits::CoefficientType, LinAlgTraits>;
     using SystemVector = LinearForm<GlobalBasis, typename Traits::CoefficientType, LinAlgTraits>;
     using SolutionVector = DOFVector<GlobalBasis, typename Traits::CoefficientType, LinAlgTraits>;

amdis/ProblemStat.inc.hpp

@@ -228,8 +228,7 @@ void ProblemStat<Traits>::createSolver()
   std::string solverName = "default";
   Parameters::get(name_ + "->solver", solverName);
 
-  using Solver = AMDiS::LinearSolver<Mat,Vec,Vec>;
-  linearSolver_ = std::make_shared<Solver>(solverName, name_ + "->solver");
+  linearSolver_ = std::make_shared<LinearSolver>(solverName, name_ + "->solver");
 }