Fixed type error
Fixed type error


Former-commit-id: cd854d15ab4f07446b5dc30659574ede1e035de3 [formerly ffe2cf91c5bb1316b3640a2983ed31b3472925fb]
Former-commit-id: 42cb8b6a7b2c31a5a1aa2c23e3ad97d253608674
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine