gst-libs/gst/audio/gstbaseaudiosink.c: Report latency even if we are not live instead...

gst-libs/gst/audio/gstbaseaudiosink.c: Report latency even if we are not live instead of hiding it.

Original commit message from CVS:
* gst-libs/gst/audio/gstbaseaudiosink.c:
(gst_base_audio_sink_query), (gst_base_audio_sink_skew_slaving),
(gst_base_audio_sink_render):
Report latency even if we are not live instead of hiding it.
Take ts-offset and render-delay of the basesink into account when
scheduling samples.
Rework the clipping code so that we can take the various offsets into
account and still do correct clipping.