pytorch

66452e0a - Ensure num_threads is initialized before calling omp_get_max_threads (#60185)

Ensure num_threads is initialized before calling omp_get_max_threads (#60185) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/60185 `get_num_threads` is usually called before `parallel_for` so there's no guaruntee we've initialized `num_threads` properly. Test Plan: Imported from OSS Reviewed By: albanD Differential Revision: D29287814 Pulled By: ngimel fbshipit-source-id: 7e9c86fc32d63889a57a9b1d2b7d8f3863481dce