Add fix to allow reading in truth data using another method when TruthParticleContainer is empty (!49263) · Merge requests · atlas / athena

Tom Hitchings requested to merge thitchin/athena:21.9b into 21.9 Dec 20, 2021

Fixes issue where truth data cannot be read using a different method if TruthParticleContainer is empty

Add fix to allow reading in truth data using another method when TruthParticleContainer is empty