[audio_core] fix OOB copy when silencing channel on shutdown (#3969)

when shutting down the emulator will silence any remaining audio from the output buffer
however this is for some reason stored in an array instead of being a simple memset
additionally, said array can be small enough (`frame_size_bytes > silence.size()`) to cause a funky noise to play at the end

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3969
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>

0 files changed, 0 insertions, 0 deletions