rename variable 'rodAssembler' to 'assembler'. There is nothing rod specific here

[[Imported from SVN: r5984]]

dune/gfe/riemanniantrsolver.hh

@@ -41,7 +41,7 @@ public:
 
     /** \brief Set up the solver using a monotone multigrid method as the inner solver */
     void setup(const GridType& grid, 
-               const GeodesicFEAssembler<typename GridType::LeafGridView, TargetSpace>* rodAssembler,
+               const GeodesicFEAssembler<typename GridType::LeafGridView, TargetSpace>* assembler,
                const SolutionType& x,
                const Dune::BitSetVector<blocksize>& dirichletNodes,
                double tolerance,