[gnome-applets] mixer: add missing function prototype

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 6e4f456271fb38d5c3a6be824f0ca258bcfa2c6c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Jul 4 00:30:03 2014 +0300

    mixer: add missing function prototype

 mixer/applet.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/mixer/applet.h b/mixer/applet.h
index cbff8c8..dac2844 100644
--- a/mixer/applet.h
+++ b/mixer/applet.h
@@ -95,6 +95,7 @@ typedef struct _GnomeVolumeAppletClass {
   PanelAppletClass klass;
 } GnomeVolumeAppletClass;
 
+GList   *gnome_volume_applet_create_mixer_collection (void);
 void     gnome_volume_applet_adjust_volume (GstMixer      *mixer,
                                            GstMixerTrack *track,
                                            gdouble        volume);