Patch on a fix for the llmediadataclient.cpp unit test.
Patch on a fix for the llmediadataclient.cpp unit test.

My refactor of LLMediaDataClient caused a crash in the windows unit test.  Change set 92fd90bd795a fixed the crash, but broke the code in question.  This changeset should make the code behave correctly, while removing some premature optimization that I now think didn't properly in the first place.

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