[gnome-control-center] sound: fix a couple of implicit declarations

[Bastien Nocera <hadess src gnome org>]

commit 2c57a2896cfa41282c7823f966be9c8881cc5338
Author: Antoine Jacoutot <ajacoutot gnome org>
Date:   Mon Jan 30 14:26:04 2012 +0100

    sound: fix a couple of implicit declarations
    
    Include math.h to prevent implicit/incompatible declarations on round(3).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=669025

 panels/sound/gvc-mixer-dialog.c       |    1 +
 panels/sound/gvc-stream-status-icon.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/panels/sound/gvc-mixer-dialog.c b/panels/sound/gvc-mixer-dialog.c
index c7c2614..2ce2513 100644
--- a/panels/sound/gvc-mixer-dialog.c
+++ b/panels/sound/gvc-mixer-dialog.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <math.h>
 
 #include <glib.h>
 #include <glib/gi18n-lib.h>
diff --git a/panels/sound/gvc-stream-status-icon.c b/panels/sound/gvc-stream-status-icon.c
index 6071de8..01e35a3 100644
--- a/panels/sound/gvc-stream-status-icon.c
+++ b/panels/sound/gvc-stream-status-icon.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <math.h>
 
 #include <glib.h>
 #include <glib/gi18n.h>