message::body is a member function (API Change):

fix #778

* The body data member is replaced with accessor
  member functions.

Actions Required:

* Call member function message::body instead of accessing
  the data member at call sites.

test/beast/http/serializer.cpp

@@ -102,7 +102,7 @@ public:
         lambda visit;
         error_code ec;
         response<string_body> res;
-        res.body.append(1000, '*');
+        res.body().append(1000, '*');
         serializer<false, string_body> sr{res};
         sr.limit(limit);
         for(;;)