[PATCH 0/1] MR8345: Draft: windows.web/tests: Fix checking of non-null terminated json.

[Yuxuan Shui (＠yshui)]

check_json_ uses wcslen on the passed json string, which is no good for
non-null terminated ones. It should have a length parameter.

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(made a draft since i am not sure what this test is meant to test, see comment.)