Make smf_track_get_next_event gracefully handle empty tracks.

git-svn-id: svn://localhost/ardour2/branches/3.0@4581 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 4 insertions, 1 deletions

diff --git a/libs/evoral/src/libsmf/smf.c b/libs/evoral/src/libsmf/smf.c
index 8b8f1bb604..7c978a8c8e 100644
--- a/libs/evoral/src/libsmf/smf.c
+++ b/libs/evoral/src/libsmf/smf.c
@@ -688,12 +688,15 @@ smf_track_get_next_event(smf_track_t *track)
 {
 	smf_event_t *event, *next_event;
 
+	/* Track is empty? */
+	if (track->number_of_events == 0)
+		return (NULL);
+
 	/* End of track? */
 	if (track->next_event_number == 0)
 		return (NULL);
 
 	assert(track->next_event_number >= 1);
-	assert(track->number_of_events > 0);
 
 	event = smf_track_get_event_by_number(track, track->next_event_number);