Original commit message from CVS:
* ext/alsa/gstalsa.c: (gst_alsa_drain_audio):
* ext/alsa/gstalsasink.c: (gst_alsa_sink_flush_one_pad),
(gst_alsa_sink_check_event), (gst_alsa_sink_mmap),
(gst_alsa_sink_write), (gst_alsa_sink_loop):
* ext/alsa/gstalsasink.h:
- add debugging info
- clean up schizophrenia of data/buffer/event
- fix double event unref error