sys/xvimage/xvimagesink.c: Use calculated video geometry from _setcaps instead of buffer caps to respect pixel aspect...

Original commit message from CVS:
2005-11-28  Julien MOUTTE  <julien@moutte.net>

* sys/xvimage/xvimagesink.c: (gst_xvimagesink_xvimage_put):
Use calculated video geometry from _setcaps instead of buffer
caps to respect pixel aspect ratio. (fixes #322388)