Fixed bug in ucerf_hazard for #ses > 1
Fixed bug in ucerf_hazard for #ses > 1


Former-commit-id: c4d8fd6aeea011c57dfaa02f2dfd4137198b54a8
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine