Undefined index '#type' in WebformActions::processWebformActions on line 128

Problem/Motivation

So far I've only observed this error when using Webform with Config Entity Revisions, but the code in question doesn't look to see if the index in question is actually set before trying to access it, so it seems reasonable to add a check.

Proposed resolution

In the code, check if the '#type' index is set before using it in a comparison.