[PATCH 0/1] MR3588: windows.media.devices: Define GUID_STR_LEN without using a magic number.

[Alex Henrie (＠alexhenrie)]

The exact number (38) is not very important, and using `ARRAY_SIZE` instead tells the reader that there is little chance that the number was calculated incorrectly.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/3588