IsJToken returns false for JToken

[oliverjanik]

RethinkDb.Driver.Utils.ExtensionsForType has this method:

    public static bool IsJToken(this Type type)
    {
      return ExtensionsForType.IsASubclassOf(type, typeof (JToken));
    }

This only returns true if type is a subclass of JToken not JToken itself.

This is causing different output when I ask for JToken rather than JObject.