Fix size of histc return on CPU when input is 0-dimensional and bins=1. (#21497)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21497
ghimport-source-id: bc03f27408aa772f78d5351afe404b5e91a7c4ce
Differential Revision: D15715478
Pulled By: gchanan
fbshipit-source-id: 90e1b65249b4b12f936ee8877cc0bc5a972d9ceb
