bug with function EditableGeoJsonLayer.getCursor()

[linze99]

after deck.gl update to 8.8.0+,my propram raise a exception like this:

it happend in the function EditableGeoJsonLayer.getCursor(),

at the mean time this.state is undefined but not null;

after changed the code with:

  if (this.state === null || this.state === undefined) {
    // Layer in 'Awaiting state'
    return null;
  }

it works fine

[Matt Dunlap]

@linze99 are you on React 18? I ran into the same issue and I'm wondering if it could be related to automatic batching in React 18.