vib.d suppress 404 for no content written

[Nicholas Wilson]

I have an endpoint that is a post:

void postStuff(HTTPServerRequest req, HTTPServerResponse res)
{
     // do some stuff with req
     res.statusCode = 200;
}

I do not write anything to res (deliberately) but want to set the 
status code.

However it returns 404, because no content is written.
How can I make it return 200?

FWIW its a member of a web interface class.

Thanks
Nic