Fixing the implementation of addTrackState_impl to avoid breaking nightlies.
A quick fix for addTrackState_impl in MultiTrajectory.icc to avoid breaking nightlies - https://its.cern.ch/jira/browse/ATLASRECTS-7314
Edited by Marcin Wolter
A quick fix for addTrackState_impl in MultiTrajectory.icc to avoid breaking nightlies - https://its.cern.ch/jira/browse/ATLASRECTS-7314