handle a rare case of histogram min is inf/nan (#18239)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18239
When min is inf or nan, we get UBSAN errors
Reviewed By: csummersea
Differential Revision: D14537668
fbshipit-source-id: e70ffb5ecd2b10793356070c69fdabf8f25b203e
