some corrections to get correct parameter prefixes

dune/fem-dg/operator/dg/operatorbase.hh

@@ -94,7 +94,10 @@ namespace Dune {
       , numflux_( model_ )
       , gridPart_( gridPart )
       , space_( gridPart_ )
-      , discreteModel_( model_, numflux_, DiffusionFluxType( gridPart_, model_, DGPrimalFormulationParameters( "dgdiffusionflux." + keyPrefix ) ) )
+      , dgdiffusionfluxPrefix_( "dgdiffusionflux"+ std::string(keyPrefix=="" ? "" : "." ) )
+      , discreteModel_( model_, numflux_,
+                        DiffusionFluxType( gridPart_, model_,
+                                           DGPrimalFormulationParameters( dgdiffusionfluxPrefix_+ keyPrefix ) ) )
       , startPass_()
       , pass1_( discreteModel_, startPass_, space_ )
     {}
@@ -193,6 +196,7 @@ namespace Dune {
     GridPartType& gridPart_;
 
     AdvDFunctionSpaceType space_;
+    const std::string dgdiffusionfluxPrefix_;
     DiscreteModelType discreteModel_;
     Pass0Type startPass_;
     Pass1Type pass1_;

dune/fem-dg/operator/dg/primaloperator.hh

@@ -331,7 +331,8 @@ namespace Dune {
       , uTmp_( 0 )
       , fvSpc_( 0 )
       , indicator_( 0 )
-      , diffFlux_( gridPart_, model_, DGPrimalFormulationParameters( "dgdiffusionFlux." + keyPrefix )  )
+      , dgdiffusionfluxPrefix_( "dgdiffusionflux"+ std::string(keyPrefix=="" ? "" : "." ) )
+      , diffFlux_( gridPart_, model_, DGPrimalFormulationParameters( dgdiffusionfluxPrefix_ + keyPrefix ) )
       , problem1_( model_, numflux_, diffFlux_ )
       , limitProblem_( model_ , space_.order() )
       , pass0_()
@@ -469,6 +470,8 @@ namespace Dune {
 
     IndicatorSpaceType*  fvSpc_;
     IndicatorType*       indicator_;
+    const std::string dgdiffusionfluxPrefix_;
+
 
   protected:
     DiffusionFluxType   diffFlux_;

dune/fem-dg/operator/fluxes/averageflux.hh

@@ -63,6 +63,7 @@ namespace Dune {
     using BaseType :: model_;
     using BaseType :: cflDiffinv_;
     using BaseType :: numericalFlux ;
+    using BaseType :: parameter ;
 
 
   public:

dune/fem-dg/operator/fluxes/ldgflux.hh

@@ -59,7 +59,7 @@ namespace Dune {
     using BaseType :: dimensionFactor_;
     using BaseType :: nonconformingFactor_;
     using BaseType :: numericalFlux ;
-
+    using BaseType :: parameter;
 
   public:
     /**