fixing check for noDamageLimit where 0 is a valid value
fixing check for noDamageLimit where 0 is a valid value


Former-commit-id: e4f81e4e77a7226b19ce5bdd595aa9379bc8ac34
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine