[release/7.0-rc2] Handle a null szPname field

[github-actions]

Backport of #75695 to release/7.0-rc2

/cc @stephentoub@jkoritzinsky

Customer Impact

NullReferenceException when upgrading from .NET 6 to .NET 7 RC 1 in System.Speech on Windows.

Testing

Verified locally that the exception happens before the fix and does not happen after the fix.

Risk

Low

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

[ghost]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[ghost]

Tagging subscribers to this area: @danmoseley
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Backport of #75695 to release/7.0-rc2

/cc @stephentoub@jkoritzinsky

Customer Impact

NullReferenceException when upgrading from .NET 6 to .NET 7 RC 1

Testing

Risk

Low

IMPORTANT: Is this backport for a servicing release? If so and this change touches code that ships in a NuGet package, please make certain that you have added any necessary package authoring and gotten it explicitly reviewed.

Author:	github-actions[bot]
Assignees:	-
Labels:	area-System.Speech
Milestone:	-

[jkoritzinsky]

@danmoseley it looks like the update to the unit test doesn't work, maybe because trying to output to the audio device in the VM configurations we use for testing fails?

[danmoseley]

@danmoseley it looks like the update to the unit test doesn't work, maybe because trying to output to the audio device in the VM configurations we use for testing fails?

Hmm, now you know the regkey, if you set that locally, but don't have this extra line in the test, does it repro? (ie., the line is unnecessary -- I assume so). If so -- we're good.

Please send tactics mail for this. thanks for fixing.

[jkoritzinsky]

I locally tested with a smaller sample (the two lines from the original issue), not with the unit test, to get the repro locally

[stephentoub]

Thanks.

[carlossanlop]

CI failures are a couple of cancelations due to timeouts during job initialization. Unrelated.
Approved and signed off. Ready to merge.