Define traits::is_view for non fusion types

test/sequence/define_struct_inline.cpp

@@ -66,6 +66,7 @@ void run_test()
     
     {
         BOOST_MPL_ASSERT_NOT((traits::is_view<Point>));
+        BOOST_STATIC_ASSERT(!traits::is_view<Point>::value);
         Point p(123, 456);
 
         std::cout << at_c<0>(p) << std::endl;