Ignore the emulated wiimotes speaker data if the sample rate is set at 0hz.

Fixes issue 7806.
Packed the emu wiimote structs, removed swap16 and removed the speaker amp as the amp was distorting the audio.
Merge pull request #1508 from skidau/emu-wiimote-speaker-sample-rate-zero

Ignore the emulated wiimotes speaker data if the sample rate is set at 0hz