[mutter/gnome-3-18] backend: Add missing include

[Florian Müllner <fmuellner src gnome org>]

commit 15b5e6717f0af3de00bd680d50be17fc945a54c0
Author: Florian Müllner <fmuellner gnome org>
Date:   Thu Nov 12 16:11:14 2015 +0100

    backend: Add missing include

 src/backends/meta-backend.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/meta-backend.c b/src/backends/meta-backend.c
index 79e5f2e..8197478 100644
--- a/src/backends/meta-backend.c
+++ b/src/backends/meta-backend.c
@@ -24,6 +24,8 @@
 
 #include "config.h"
 
+#include <stdlib.h>
+
 #include <meta/meta-backend.h>
 #include "meta-backend-private.h"
 #include "meta-input-settings-private.h"