Cast not expressions to bool (#19361)
Summary:
As part of implicitly casting condition statements, we should be casting not expressions as well.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19361
Differential Revision: D14984275
Pulled By: eellison
fbshipit-source-id: f8dae64f74777154c25f7a6bcdac03cf44cbb60b
