Add sanity check to TupleToolHOP
Check a valid PV was retrieved before accessing its properties.
Running a dummy selection without PV existence check or anything similar I got a segmentation fault for events where the PV was not found. In general this should not happen but a sanity check is now added to avoid the crash in such a case. Instead, a dummy value (HOP = 0) is returned.
This should be ported also to master, etc.
Edited by Carla Marin Benito