player: Finish porting the error_cb from the old video-texture
player: Finish porting the error_cb from the old video-texture

The error_cb was split between VideoTexture and Player at first, but
then the implementation of Player changed witout and it was possiblet to
have the error_cb handle everything. Except that it was not ported.

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