DilatedMaxPool: expand incomplete kernel_size for the C++ API (#22073)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/22032.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22073
Differential Revision: D15944471
Pulled By: mrshenli
fbshipit-source-id: 84b265be00d67aa7f13508ede0646763d2339f1d
