No hcal energy for neutral protos

It has been observed that no hcal energy (all reported zero) was determined for neutral protoparticles. This refers to the CaloNeutralHCal2Ecal variable.

As reported in https://indico.cern.ch/event/1299269/, see specifically https://indico.cern.ch/event/1299269/contributions/5565243/attachments/2708764/4703254/Issue%20with%20CaloNeutralShowerShape.pdf

Fix available in !3566 (merged)

fyi: @yihou @desahoo @bdey @calvom @dovombru @cmarinbe