ext/dv/gstdvdec.c: Fix format conversion and position querying.

ext/dv/gstdvdec.c: Fix format conversion and position querying.

Original commit message from CVS:
* ext/dv/gstdvdec.c: (gst_dvdec_init), (gst_dvdec_get_formats),
(gst_dvdec_src_convert), (gst_dvdec_sink_convert):
Fix format conversion and position querying.
* gst/debug/progressreport.c: (gst_progressreport_report):
Don't output a bogus total value that we didn't query.
* sys/xvimage/xvimagesink.c: (gst_xvimagesink_get_xv_support):
Always set XV_AUTOPAINT_COLORKEY to true. Fixes xvimagesink showing
only a blank window after xine has been used.