sys/xvimage/xvimagesink.c: Discovered how to take away flickering while resizing the window. Please don't put that in...

Original commit message from CVS:
2005-11-14  Julien MOUTTE  <julien@moutte.net>

* sys/xvimage/xvimagesink.c: (gst_xvimagesink_xwindow_new):
Discovered how to take away flickering while resizing the
window. Please don't put that in ximagesink, refactoring in
progress.