[longomatch] Fix ROI rendering clips with audio

[Andoni Morales Alastruey <amorales src gnome org>]

commit 973c49b7b5bd4b6cfab309d3d9ea4a564ca633cf
Author: Andoni Morales Alastruey <ylatuya gmail com>
Date:   Tue May 5 11:00:17 2015 +0200

    Fix ROI rendering clips with audio
    
    Only configure title and roi for the firt video buffer
    and skip the audio ones

 libcesarplayer/gst-nle-source.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libcesarplayer/gst-nle-source.c b/libcesarplayer/gst-nle-source.c
index 38175ea..fe079bd 100644
--- a/libcesarplayer/gst-nle-source.c
+++ b/libcesarplayer/gst-nle-source.c
@@ -389,7 +389,7 @@ gst_nle_source_push_buffer (GstNleSource * nlesrc, GstBuffer * buf,
       nlesrc->accu_time = new_ts;
     }
 
-    if (G_UNLIKELY (!nlesrc->item_setup)) {
+    if (G_UNLIKELY (!nlesrc->item_setup) && !is_audio) {
       gst_nle_source_update_videocrop (nlesrc, GST_BUFFER_CAPS (buf));
       gst_nle_source_update_overlay_title (nlesrc);
       nlesrc->item_setup = TRUE;