Moved `pointsource_distance == 0` at the sourceconverter level
Moved `pointsource_distance == 0` at the sourceconverter level


Former-commit-id: c22e08221ffcea928d61d49bb146be7923502afd [formerly fb80d508cda4e15ce319e2d10ec086656aa9150e]
Former-commit-id: 414e723d435565881897563ca5df52258de0fa73
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine