[empathy] empathy-utils: add missing math.h include

[Guillaume Desmottes <gdesmott src gnome org>]

commit aad54d87ec506eac48edea50bb64c4de91cbe72a
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Wed Apr 10 10:54:47 2013 +0100

    empathy-utils: add missing math.h include

 libempathy/empathy-utils.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libempathy/empathy-utils.c b/libempathy/empathy-utils.c
index c9eb5ca..55769ca 100644
--- a/libempathy/empathy-utils.c
+++ b/libempathy/empathy-utils.c
@@ -31,6 +31,7 @@
 
 #include <glib/gi18n-lib.h>
 #include <dbus/dbus-protocol.h>
+#include <math.h>
 
 #include "empathy-client-factory.h"
 #include "empathy-presence-manager.h"