Fixed T26903 in order to allow storing of DICOM seg again.
Summary: Signed-off-by: Ralf Floca <r.floca@dkfz-heidelberg.de>
Test Plan: Unit test, User test: able to write DICOM seg again.
Reviewers: MITK Reviewer Group I, neher, kislinsk
Reviewed By: MITK Reviewer Group I, kislinsk
Subscribers: kislinsk
Maniphest Tasks: T26903
Differential Revision: https://phabricator.mitk.org/D242