Modified handling of source update in gstreamervideorenderer as the existing logic meant that it would never emit the readyChanged signal. Change-Id: I0a1488cfc151388fe0145d231001e502e9f45f0e Reviewed-by: Michael Goddard <michael.goddard@nokia.com> Reviewed-by: Mithra Pattison <mithra.pattison@nokia.com>