calcs/hazard/classical/core:
calcs/hazard/classical/core:

Added handling for a corner case so the query block size doesn't get set to
zero.


Former-commit-id: 039d5ae5b912b6a115ee4023b251a18d15e76cf1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine