@:path with just a parameter doesn't seem to work

Kris seems to have an issue with a route that's setup like this:

```
@:path("/product")
class MyRoute {
  @:post("/:myarg")
  function myFunc(myarg : String) { ... }
}
```

If he does `POST /product/something` it gets a 404, but if he changes the function meta to `@:post("/x/:myarg")` and does `POST /product/x/something` it works.
