Added hostIntersection to SubGridIntersection

dune/subgrid/subgrid/subgridintersection.hh

@@ -60,6 +60,11 @@ public:
         return insideIntersect_.indexInOutside();
     }
 
+    //! get associated hostgrid entity
+    const HostLevelIntersection& hostIntersection(void) const {
+        return insideIntersect_;
+    }
+
 protected:
     //! The subgrid
     const GridImp* subGrid_;