LGTVDeviceListener shows "unknown error" instead of the correct system error message

[dechamps]

For example:

[ERROR  ] FATAL: Failed to open client key file: unknown error

Whereas I expected:

[ERROR  ] FATAL: Failed to open client key file: Access is denied.

The root cause is this Visual C++ bug. It only seems to occur when the Windows locale is set to something other than en-US.