utils/stats: fixed return value of pk_get
utils/stats: fixed return value of pk_get


Former-commit-id: 8461b99f991ffbce763480c6e072a6601e80b8e8 [formerly 8461b99f991ffbce763480c6e072a6601e80b8e8 [formerly 1a74f91e5b98765297c13d8d377213ab04b1ca71]]
Former-commit-id: 8945974f8e5c8d94aebbaf8a143bbe748a32273f
Former-commit-id: 5cfcfbdef1cb3f708f5af538d9b9ec77ccd6934d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine