merge two constructors into one with a default argument

[[Imported from SVN: r3316]]

dune/solvers/common/permutationmanager.hh

@@ -194,21 +194,8 @@ public:
     {
     }
 
-  // Constructor for default axis of anisotropy = dim-1
-  inline explicit PermutationManager ( GridViewType gridView)
-    : gridView_( gridView ),
-      node_list_( gridView.size(dim) ),
-      original_node_list_( gridView.size(dim) ),
-      axis_of_anisotropy_( dim-1 ),
-      number_of_blocks_( 0 ),
-      blocks_set_up_( false ),
-      permutation_set_up_( false )
-    {
-      set_up_node_lists();
-    }
-
   // Constructor for setting number of the axis along which we have the anisotropy (0=x, 1=y, 2=z)
-  inline explicit PermutationManager ( GridViewType gridView, const int axis_of_anisotropy)
+  inline explicit PermutationManager ( GridViewType gridView, const int axis_of_anisotropy=dim-1)
     : gridView_( gridView ),
       node_list_( gridView.size(dim) ),
       original_node_list_( gridView.size(dim) ),