Some cleanup in _gen_riskinputs [skip hazardlib]
Some cleanup in _gen_riskinputs [skip hazardlib]


Former-commit-id: 76711f64b6b90a0f28a5934957a5532ec4c1a392
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine