pc is cleaned by solver

mlmc/src/montecarlo/MonteCarloElliptic.hpp

@@ -36,13 +36,11 @@ public:
         fineSolution(Vector(solMatrixGraphs[l - pLevel])),
         coarseSolution(Vector(solMatrixGraphs[l - pLevel - 1])) {
 
-        pc = GetPC("SuperLU");
-        solver = new Solver(pc, "GMRES");
+        solver = new Solver(GetPC("SuperLU"), "GMRES");
         newton = new Newton(*solver);
     }
 
     virtual ~MonteCarloElliptic() {
-        delete pc;
         delete solver;
         delete newton;
     }