Fix #1921

[pygy]

Description

fix for #1921: Don't visit the children array of components, even when the instance is null.

How Has This Been Tested?

npm run test before and after the fix. Fails before (exception thrown because the _state is null), succeeds after.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated docs/change-log.md

[dead-claudia]

LGTM. An added bonus is that it's a little more readable, too. 😄 👍

[pygy]

Thanks @isiahmeadows I was about to add you as a reviewer (the others were added automatically)

@tivac while I don't feel like I "own" any file in the project, I wouldn't mind being automatically added as a reviewer to PRs about the most of the code base...

[dead-claudia]

@pygy Just add yourself here to whatever directory suits your fancy. 😉

[dead-claudia]

You'll need to look here, though.

[tivac]

Yep! No reason to wait for me, just add yourself to whichever things you care about.