Remove some unnecessary NULL checks.
Review Request #445 — Created Jan. 23, 2021 and submitted — Latest diff uploaded
* When removing a buddy, the group is optional as noted in the description. * When setting a buddy icon, the icon may be %NULL to remove existing icons.
Compile and watch for assertion failures in the log, when signing out of Bonjour, and when removing a buddy icon from an account (which did nothing.)