again a typo

[[Imported from SVN: r2881]]

grid/common/defaultindexsets.hh

@@ -570,7 +570,7 @@ namespace Dune {
 
     //! return LevelIndex of given entity
     template<int cd>
-    int index (const typename GridImp::template Codim<cc>::Entity& en) const
+    int index (const typename GridImp::template Codim<cd>::Entity& en) const
     {
       assert( level_ == en.level() );
       return levelIndex_[cd][ hIndexSet_.index(en) ];