element: Add API safe guard against invalid position in edit()

diff --git a/ges/ges-timeline-element.c b/ges/ges-timeline-element.c
index cee9fb4..2a2a206 100644 (file)
--- a/ges/ges-timeline-element.c
+++ b/ges/ges-timeline-element.c
@@ -2483,6 +2483,7 @@ ges_timeline_element_edit (GESTimelineElement * self, GList * layers,
   GESTimeline *timeline;
 
   g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (self), FALSE);
+  g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (position), FALSE);
 
   timeline = GES_TIMELINE_ELEMENT_TIMELINE (self);
   /* FIXME: handle a NULL timeline! */