[cogl] cogl-gst: Remove the return value from attach_frame()

[Neil Roberts <nroberts src gnome org>]

commit 0805f3e9db715fc2c97b7e60d4f3a25e7fa598fc
Author: Neil Roberts <neil linux intel com>
Date:   Thu Apr 25 19:01:37 2013 +0100

    cogl-gst: Remove the return value from attach_frame()
    
    Previously cogl_gst_video_sink_attach_frame returned the last layer
    used by the sink. This can also be retrieved via
    cogl_gst_video_sink_get_free_layer so I don't think it's necessary to
    return it here and it seems kind of out of place.
    
    Reviewed-by: Robert Bragg <robert linux intel com>

 cogl-gst/cogl-gst-video-sink.c |    4 +---
 cogl-gst/cogl-gst-video-sink.h |    5 +----
 2 files changed, 2 insertions(+), 7 deletions(-)
---
diff --git a/cogl-gst/cogl-gst-video-sink.c b/cogl-gst/cogl-gst-video-sink.c
index 8fe6aca..50c2f91 100644
--- a/cogl-gst/cogl-gst-video-sink.c
+++ b/cogl-gst/cogl-gst-video-sink.c
@@ -190,7 +190,7 @@ cogl_gst_video_sink_get_free_layer (CoglGstVideoSink *sink)
   return sink->priv->free_layer;
 }
 
-int
+void
 cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
                                   CoglPipeline *pln)
 {
@@ -201,8 +201,6 @@ cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
     if (priv->frame[i] != NULL)
       cogl_pipeline_set_layer_texture (pln, i + priv->custom_start,
                                        priv->frame[i]);
-
-  return priv->free_layer;
 }
 
 static CoglBool
diff --git a/cogl-gst/cogl-gst-video-sink.h b/cogl-gst/cogl-gst-video-sink.h
index e76e742..a9694a6 100644
--- a/cogl-gst/cogl-gst-video-sink.h
+++ b/cogl-gst/cogl-gst-video-sink.h
@@ -262,12 +262,9 @@ cogl_gst_video_sink_get_free_layer (CoglGstVideoSink *sink);
  * would then make a copy of its template pipeline and call this to
  * set the textures.
  *
- * Return value: the next free layer after the sink's internal private
- *   layers. This is the same value that is returned by
- *   cogl_gst_video_sink_get_free_layer().
  * Since: 1.16
  */
-int
+void
 cogl_gst_video_sink_attach_frame (CoglGstVideoSink *sink,
                                   CoglPipeline *pln);