[PATCH v2 0/1] MR10395: crypt32: Don't access CERT_CHAIN_ENGINE_CONFIG::dwExclusiveFlags without checking size.

[Yuxuan Shui (＠yshui)]

Found by ASan.

Example in test `crypt32:chain`, `testCreateCertChainEngine`. Pointer to a `CERT_CHAIN_ENGINE_CONFIG_NO_EXCLUSIVE_ROOT` is passed to `CertCreateCertificateChainEngine`. Accessing `dwExclusiveFlags` unconditionally is out-of-bound.

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  v2: crypt32: Don't access CERT_CHAIN_ENGINE_CONFIG::dwExclusiveFlags without checking size.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/10395