Recurring events waitlist promotion to registrant list does not email

Problem/Motivation

— Registrants that are moved from the waitlist to fill an open space for an event do not receive the promotion notification.

Steps to reproduce

Custom/one-instance event sample with registration was created to test. I limited the number of spaces to 1. I registered myself and a colleague for the event—I was registered, she was on the waitlist. I then used the link in my email to delete my registration. She never received the promotion email even though the website listed her as off the waitlist.
Recreated the same scenario and added one more step of "completing" both registrations prior to deleting from my email link.

Proposed resolution

The module checks an event series value:

Registration Type
[ ] Individual Event Registration
[ ] Entire Series Registration

The system only emails for wait-list promotion to registered if 1) either the individual event is in the future or 2) the entire series is in the future. But the code accidentally checks getRegistrationDatesType instead of getRegistrationType