added missing constructor.

dune/fem-dg/solver/rungekuttasolver.hh

@@ -58,6 +58,8 @@ public:
 
   typedef std::pair< OdeSolverInterfaceType* ,  HelmHoltzOperatorType* > solverpair_t ;
 
+  typedef SmartOdeSolverParameters ParameterType;
+
   /////////////////////////////////////////////////////////////////////////
   //  ODE solvers from dune-fem/dune/fem/solver/rungekutta
   /////////////////////////////////////////////////////////////////////////

dune/fem-dg/solver/smartodesolver.hh

@@ -11,6 +11,10 @@ namespace Dune {
 
 struct SmartOdeSolverParameters : public DuneODE :: ODEParameters
 {
+  SmartOdeSolverParameters( const std::string keyPrefix = "fem.ode" )
+    : DuneODE :: ODEParameters( keyPrefix )
+  {}
+
   using DuneODE :: ODEParameters :: keyPrefix_;
 
   virtual double explicitFactor() const