* config.in: Regenerated (HAVE_ALSA).

* config.in: Regenerated (HAVE_ALSA).

	* sound.c (alsa_sound_perror, alsa_open, alsa_period_size)
	(alsa_configure, alsa_close, alsa_choose_format, alsa_write)
	(snd_error_quiet, alsa_init): New functions.
	(vox_init): Return 0 if unable to open device.
	(Fplay_sound_internal): Test for alsa first and use vox (oss) as
	a fallback.
	(struct sound_device): Add period_size.
	(wav_play, au_play): Use period_size if set.

	* Makefile.in (CFLAGS_SOUND): New flags for ALSA
	(ALL_CFLAGS): Add CFLAGS_SOUND