'voice' is not initialized
This fixes kern/15394 by Onno van der Linden.
Code fragment to trigger the bug:
AUDIO_INITINFO(&info);
info.mode = AUMODE_PLAY;
info.play.channels = 2;
fd = open("/dev/audioctl0", O_RDWR);
(void)ioctl(fd, AUDIO_SETINFO, &info);
emuxki_voice_set_audioparms(): g/c check for voice == NULL, this is
never called with null voice
some minor style changes in emuxki_open()/emuxki_close()
1731882d0a