ext/alsa/gstalsasink.*: Remove unused dispose function.
Original commit message from CVS:
* ext/alsa/gstalsasink.c: (gst_alsasink_class_init),
(gst_alsasink_write), (gst_alsasink_reset):
* ext/alsa/gstalsasink.h:
Remove unused dispose function.
Rename lock to not interfere with alsasrc lock.
* ext/alsa/gstalsasrc.c: (gst_alsasrc_finalize),
(gst_alsasrc_class_init), (gst_alsasrc_init), (set_swparams),
(gst_alsasrc_read), (gst_alsasrc_reset):
* ext/alsa/gstalsasrc.h:
Implement finalize function.
Use lock to protect alsa access.
Implement _reset.
Fine tune sw params.
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