pytorch

c04d39aa - [quant][bug] Histogram observer bug fix with min == max (#40310)

[quant][bug] Histogram observer bug fix with min == max (#40310) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/40310 Test Plan: python test/test_quantization.py test_histogram_observer_same_inputs Imported from OSS Differential Revision: D22145908 fbshipit-source-id: c1646d9ae6738755981fe3d09c8a8e25fcb994d4