player_set_volume passed `volume` through untouched. Each backend
clamps to 0.0..=1.0 for itself, so local playback was already safe, but
the remote branch reaches no backend: it converts with
`(volume * 100.0) as i32`, which turns infinity into i32::MAX. NaN is
handled explicitly since f32::clamp returns NaN for a NaN input and it
then survives every comparison downstream.
TRACES: DR-212 | UT-206
dtourolle
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