bogus parameter-count error following error in parameter list

``` rust
fn foo(Option<i32>) {}

fn main() {
    foo(Some(42));
}
```

The first error is about the missing argument name in `foo`'s parameter list, but there's another one on the call saying that the function doesn't take any parameters. I guess a dummy item was created to prevent cascading resolve errors, but it seems to create another kind of cascading error.
