Fixed T27078
Summary:
- additionally prevented random crashes on "clear session" due to missing nullptr check in GenerateStatisticsNodeName()
Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>
Test Plan: Does not crash any more, as described in task
Reviewers: kalali, MITK Reviewer Group I, kislinsk
Reviewed By: MITK Reviewer Group I, kislinsk
Maniphest Tasks: T27078
Differential Revision: https://phabricator.mitk.org/D244