Add constructor

dune/tnnmg/localsolvers/scalarbisectionsolver.hh

@@ -28,6 +28,8 @@ public:
     , acceptFactor_(acceptFactor)
   {}
 
+  ScalarBisectionSolver() = default;
+
   template<class Vector, class Functional, class BitVector>
   void operator()(Vector& x, const Functional& f, const BitVector& ignore) const
   {