MMDevice is not available on older Windows versions anyway. Failing to load the plugin there is fine. It is even arguably better: it prevents impossible choices showing in the preferences.
81f3750 mmdevice: require Vista, simplify
modules/audio_output/mmdevice.c | 32 +-------------------------------
1 file changed, 1 insertion(+), 31 deletions(-)
Upstream: git.videolan.org