basesink: Update start time when we lose our state
basesink: Update start time when we lose our state

Otherwise we report not the correct position while the state is lost.

Lachann/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,surround-io/gstreamer,centricular/gstreamer,krichter722/gstreamer,krichter722/gstreamer,centricular/gstreamer,jpakkane/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,cablelabs/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,mparis/gstreamer,centricular/gstreamer,surround-io/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,surround-io/gstreamer,cfoch/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,Lachann/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,mparis/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,StreamUtils/gstreamer,centricular/gstreamer,jpxiong/gstreamer,Lachann/gstreamer,cablelabs/gstreamer,surround-io/gstreamer,krichter722/gstreamer,Lachann/gstreamer,jpakkane/gstreamer,cfoch/gstreamer,shelsonjava/gstreamer,cfoch/gstreamer,jpxiong/gstreamer,jpakkane/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,centricular/gstreamer,StreamUtils/gstreamer,mparis/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,jpxiong/gstreamer