Re: [PATCH v4 0/1] MR3391: mshtml: implement window.MutationObserver with MutationObserver stub

[Gabriel Ivăncescu (＠insn)]

BTW, it's not exactly needed for your use case, but I'd add a stub construction. i.e. add a:

```c
static const dispex_static_data_vtbl_t mutation_observer_ctor_dispex_vtbl = {
    mutation_observer_ctor_value
};
```
and the `mutation_observer_ctor_value` would just be a FIXME "stub". This will help debugging easier to see if it's *actually* used to construct anything.