removed const_cast in operations/product and norm

AMDiS/src/operations/norm.hpp

@@ -59,7 +59,7 @@ namespace AMDiS
     
     using namespace mtl::vector;
     typedef parameters<mtl::col_major, non_fixed::dimension, false, size_type> param;
-    mtl::dense_vector<const value_type, param> tmp(AMDiS::size(v), value_typev.begin());
+    mtl::dense_vector<const value_type, param> tmp(AMDiS::size(v), v.begin());
     return mtl::two_norm(tmp);
   }