calcs/hazard/general:
calcs/hazard/general:

Fixed stat calculation. It didn't work in the case of multiple source
models.


Former-commit-id: baa0f62fdce8dc51355a3c4729f0a8e2995d2d22
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine