[package] Correct usage of miniz API in PyTorchStreamReader (#55725)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55725
We were previously checking m_last_error on the miniz struct directly,
which fails to preserve internal invariants and can the leave the reader
broken in specific situations (reading a non-existent file).
Using the provided error checking API fixes this.
Differential Revision: D27693105
Test Plan: Imported from OSS
Reviewed By: SplitInfinity
Pulled By: suo
fbshipit-source-id: 20c520bb1d590fb75751bca1e970df4f2b7eb043
