video-texture: set_progress improvement
video-texture: set_progress improvement

This patch save progress set by clutter_media_set_progress() to allow
setting progress before the starting to play and to avoid reset to
beginning when the pipeline switch to PLAYING state.

Signed-off-by: Lionel Landwerlin <9463032a5b99ffad10f36631678a833369a311b5@linux.intel.com>

skinkie/clutter-gst,lubosz/clutter-gst,ystreet/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst,skinkie/clutter-gst,ystreet/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,ystreet/clutter-gst,GNOME/clutter-gst,skinkie/clutter-gst,lubosz/clutter-gst,GNOME/clutter-gst