SubgraphMatcher: add logging to a check missed previously.
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/25735
Test Plan: Imported from OSS
Differential Revision: D17216869
Pulled By: ZolotukhinM
fbshipit-source-id: 64431134dff63cb5e22fa70110ceecc56e9031e7
Author
Mikhail Zolotukhin
