Small fix for Python 3
Small fix for Python 3


Former-commit-id: 852ab647f0ce9a501572756d33382b67e35daa99 [formerly 4870eaed65981a18e5192adf05378a41b196586a]
Former-commit-id: 53f1c7bfd9139fe80344ea3e13a3a9a8dc3e52f5
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine