Const fixes for executePi0ClusterCreator
This MR is a continuation to make all TauRecTools MT ready. Tagging @xiaozhon In addition, I have modernised the code a bit (range for loops) and avoided values passed around in favour of const refs.
This MR is a continuation to make all TauRecTools MT ready. Tagging @xiaozhon In addition, I have modernised the code a bit (range for loops) and avoided values passed around in favour of const refs.