Fix messages between directly connecting objects

iZotope plugins will already send messages when connect() is called on
the first object, so this flag has to be set on both host contexts at
the same time.

src/wine-host/bridges/vst3.cpp

@@ -181,6 +181,9 @@ void Vst3Bridge::run() {
                     object_instances[request.instance_id]
                         .host_context_proxy->are_objects_directly_connected =
                         true;
+                    object_instances[request.other_instance_id]
+                        .host_context_proxy->are_objects_directly_connected =
+                        true;
                 }
 
                 return object_instances[request.instance_id]