Small fix in util/expo2csv [skip CI]
Small fix in util/expo2csv [skip CI]


Former-commit-id: ca065f09a405cf0bf733eb175343f128ffe4fefd [formerly 2b049cb04987754c5d122c3152e94bddc072299c] [formerly 2b049cb04987754c5d122c3152e94bddc072299c [formerly 7d1178f36492b1bbd5a33bfcc2c67006c833d54d]]
Former-commit-id: 71163b40a0eef64d53f9b4e0b42f06ada0caa5bb
Former-commit-id: 22899b4f9343f8ccff0801edbec50088e201533f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine