[empathy/gnome-3-10] audio-sink: fix compilation with GStreamer 0.10

[Will Thompson <wjt src gnome org>]

commit dea9f68e37b897f61eba440128fbc6dfb0b97f7e
Author: Will Thompson <will willthompson co uk>
Date:   Wed Oct 9 16:16:41 2013 +0100

    audio-sink: fix compilation with GStreamer 0.10
    
    66e393b removed this include, but without it compilation fails for me. I
    assume this is beacuse I am building Empathy against GStreamer 0.10 and
    Emanuele was building against GStreamer 1.0 when removing unneeded
    includes.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709741

 src/empathy-audio-sink.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/empathy-audio-sink.c b/src/empathy-audio-sink.c
index 985a1fa..e0e43e4 100644
--- a/src/empathy-audio-sink.c
+++ b/src/empathy-audio-sink.c
@@ -24,6 +24,7 @@
 #ifdef HAVE_GST1
 #include <gst/audio/streamvolume.h>
 #else
+#include <gst/audio/audio.h>
 #include <gst/interfaces/streamvolume.h>
 #endif