Initialize reference geometry variables correctly
Summary:
Correctly initialize reference geometry variables
This is required to not show an overlay if no interaction
reference geometry is set.
Test Plan:
manual testing
- start MITK Workbench in release mode
- move mouse to different render windows
- no warning overlay should be shown
Reviewers: kislinsk, a178n, O1 MITK Reviewer Group I, floca
Reviewed By: kislinsk, a178n, O1 MITK Reviewer Group I, floca
Subscribers: floca, a178n, kislinsk, kalali
Maniphest Tasks: T29335
Differential Revision: https://phabricator.mitk.org/D783