[warning] Fix TORCH_INTERNAL_ASSERT calls missing condition to check 2/x (#71767)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71767
This will fix a ton of broken asserts that should always fire but never actually fire.
All would have been caught with `-Wstring-conversion` warnings enabled.
Test Plan: CI Pass
Differential Revision: D33754170
fbshipit-source-id: fa47dbf3b3e6cc27a2dfbdce7ac0416c47122ad7
(cherry picked from commit 23802fe3b5e14bbee6affc1393f3966603f5a983)
