bug: route function name and function parameters cannot be named identically

[SergioBenitez]

Example:

#[route(POST, path = "/todo", form = "<todo>")]
fn todo(todo: Todo) -> String {
    ...
}

generates...

fn rocket_route_fn_todo<'rocket>(_req: rocket::Request<'rocket>)
 -> rocket::Response<'rocket> {
    let todo: Todo =
        {
            ...
        };
    let result = todo(todo); <-----
    rocket::Response::new(result)
}

resulting in the error:

src/main.rs:1:1: 58:48 error: expected function, found Todo<'_>

[SergioBenitez]

Fixed in fec443a.