[gnome-control-center] Use the right return type

[Kjartan Maraas <kmaraas src gnome org>]

commit 2a92753d9728cb9196d5674ed805a454062a8dec
Author: Kjartan Maraas <kmaraas gnome org>
Date:   Thu Feb 24 19:53:47 2011 +0100

    Use the right return type

 panels/sound/gvc-mixer-stream.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/panels/sound/gvc-mixer-stream.c b/panels/sound/gvc-mixer-stream.c
index 3f5fe56..3637bb4 100644
--- a/panels/sound/gvc-mixer-stream.c
+++ b/panels/sound/gvc-mixer-stream.c
@@ -505,7 +505,7 @@ gvc_mixer_stream_change_port (GvcMixerStream *stream,
 const GList *
 gvc_mixer_stream_get_ports (GvcMixerStream *stream)
 {
-        g_return_val_if_fail (GVC_IS_MIXER_STREAM (stream), FALSE);
+        g_return_val_if_fail (GVC_IS_MIXER_STREAM (stream), NULL);
         return stream->priv->ports;
 }