Don't immediately hang if the first option view returns null

Runtime/DialogueRunner.cs

@@ -517,15 +517,13 @@ private async YarnTask OnOptionsReceivedAsync(OptionSet options)
  }
 
  var dialogueSelectionTCS = new YarnOptionCompletionSource();
- int pendingOptionViews = 0;
  int viewsNotReturningOption = 0;
 
  async YarnTask WaitForOptionsView(AsyncDialogueViewBase? view) {
  if (view == null) {
  return;
  }
- pendingOptionViews += 1;
-
+
  var result = await view.RunOptionsAsync(localisedOptions, optionCancellationSource.Token);
  if (result != null) {
  // We no longer need the other views, so tell them to stop
@@ -535,7 +533,7 @@ async YarnTask WaitForOptionsView(AsyncDialogueViewBase? view) {
  } else {
  // Our view did not return an option. 
  viewsNotReturningOption += 1;
- if (viewsNotReturningOption >= pendingOptionViews) {
+ if (viewsNotReturningOption >= this.dialogueViews.Count) {
  // No view returned an option, so it's unanimous. Set the result to 'null'.
  dialogueSelectionTCS.TrySetResult(null);
  }