Corrected test broken by Node.js v0.10.27

Specifically, aae51ecf, which introduces deepEqual changes for comparing
argument objects---specifically, this change:

```c
  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
    return false;
```

Since I was comparing an array with an arguments object, deepEqual failed.
While such an implementation may confuse users---since argument objects are
generally treated like arrays---the distinction is important and I do agree
with the change.