splitmuxsink: Post error when requested timecode interval is invalid
splitmuxsink: Post error when requested timecode interval is invalid

In case we cannot rely on max-size-timecode for split decision,
post error instead of crashing

pexip/gst-plugins-good,GStreamer/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good