Use mv() instead of umv()

[[Imported from SVN: r6598]]

dune/solvers/norms/energynorm.hh

@@ -74,8 +74,7 @@
                 : *matrix_;
 
             DiscFuncType tmp(f.size());
-            tmp = 0;
-            A.umv(f, tmp);
+            A.mv(f, tmp);
 
             double const ret = f*tmp;
 
@@ -100,8 +99,7 @@
                                       const double tol=1e-10)
         {
             DiscFuncType tmp(u.size());
-            tmp = 0;
-            A.umv(u, tmp);
+            A.mv(u, tmp);
 
             double const ret = u*tmp;