[brasero] Fix progress bar when it is not possible to determine the position in the stream while transcoding a

[Philippe Rouquier <philippr src gnome org>]

commit 58f3bd24e4e6a963d680e5f1591be6efb424495c
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Sun Jun 21 13:52:25 2009 +0200

    Fix progress bar when it is not possible to determine the position in the stream while transcoding a video

 plugins/transcode/burn-vob.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/plugins/transcode/burn-vob.c b/plugins/transcode/burn-vob.c
index 94f300c..15a38fb 100644
--- a/plugins/transcode/burn-vob.c
+++ b/plugins/transcode/burn-vob.c
@@ -1131,12 +1131,14 @@ brasero_vob_clock_tick (BraseroJob *job)
 	gst_element_query_duration (priv->pipeline, &format, &duration);
 	gst_element_query_position (priv->pipeline, &format, &position);
 
-	if (duration > 0.0) {
+	if (duration > 0.0 && position > 0.0) {
 		gdouble progress;
 
 		progress = (gdouble) position / (gdouble) duration;
 		brasero_job_set_progress (job, progress);
 	}
+	else
+		brasero_job_set_progress (job, -1.0);
 
 	return BRASERO_BURN_OK;
 }