check for negative energy-position
Needed for Moore!1549 (merged) and LHCb!3763 (merged) to add another safety check in GraphClustering for negative energy clusters tking into account the energy used for position with cluster shapes.
Needed for Moore!1549 (merged) and LHCb!3763 (merged) to add another safety check in GraphClustering for negative energy clusters tking into account the energy used for position with cluster shapes.