I was hoping that the new tests would provide evidence that RtlQueryRegistryValues uses RegGetValue to ensure that multi-strings are double-null-terminated. Instead the tests suggest that my hypothesis was wrong because RegGetValue only ensures single null termination, not double null termination. We should fix RegGetValue anyway for the sake of applications that expect it to null-terminate.
-- v5: kernelbase: Ensure null termination in RegGetValue[AW]. windowscodecs: Use RegQueryValueExW in ComponentInfo_GetStringValue. twinapi.appcore: Initialize size argument to RegGetValueW. shell32: Pass size in bytes to RegGetValueW. msi: Initialize size argument to GetRegValueW. mscoree: Pass size in bytes to RegGetValueW.