pytorch

32777231 - Replace some malloc+memset pairs with calloc.

Replace some malloc+memset pairs with calloc. Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/15765 Differential Revision: D13588723 Pulled By: resistor fbshipit-source-id: 47d35dc608847a5b173cfcf2aaa2a77359e56722