check if input numpy array is empty in hawkes_em.cpp

X-DataInitiative / tick

Module for statistical learning, with a particular emphasis on time-dependent modelling

https://x-datainitiative.github.io/tick/

BSD 3-Clause "New" or "Revised" License

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Closed junkyul closed 5 years ago

junkyul commented 5 years ago

One line fix exactly suggested by #390 no runtime error after passing empty numpy array and passed build_test.sh