DDC not properly handling functions with universal types

The following test should print `42`.  Instead, it prints:
```
Closure: (Object) -> JSObject<undefined> from: o => T.as(a)
```

Here's the test:

```dart
h/*<T>*/(a) {
  return a as dynamic/*=T*/;
}

Object foo(f(Object a), Object a) {
  return f(a);
}

void main() {
  var x = foo(h, 42);
  print(x);
}
```