Minor cleanup

dune/contact/solvers/filtermultigridsolver.cc

@@ -79,7 +79,7 @@ void FilterMultigridContactSolver<ProblemType>::solve()
 
   // Loop until desired tolerance or maximum number of iterations is reached
   for (; it <this->maxIterations_ and (error > this->tolerance_ or std::isnan(error)) and
-       (crit> critTol_) ; it++) {
+       (crit > critTol_) ; ++it) {
 
     Dune::Timer iterationTimer;
 
@@ -94,7 +94,7 @@ void FilterMultigridContactSolver<ProblemType>::solve()
       std::cout << "Trust--region radius: " << trustRegion << "\n";
 
     // Measure norm of the old iterate
-    field_type oldNorm(0);
+    field_type oldNorm{0};
     for (size_t i=0; i<iterates.size(); i++)
       oldNorm += (*errorNorms_[i])(iterates[i]);