[gtk+] testsuite/gsk/test-render-nodes.c: Include <stdlib.h>

[Chun-wei Fan <fanchunwei src gnome org>]

commit 5b9177f53b62c2a2123edbbf541da12e1c6b700b
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Oct 24 16:14:43 2017 +0800

    testsuite/gsk/test-render-nodes.c: Include <stdlib.h>
    
    This is so that the compiler won't complain about our use of exit()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=773299

 testsuite/gsk/test-render-nodes.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/testsuite/gsk/test-render-nodes.c b/testsuite/gsk/test-render-nodes.c
index befbf9e..c1a1d70 100644
--- a/testsuite/gsk/test-render-nodes.c
+++ b/testsuite/gsk/test-render-nodes.c
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include <stdlib.h>
 #include "reftest-compare.h"
 
 static void