[gdk-pixbuf/gdk-pixbuf-2-28] Include string.h

[Matthias Clasen <matthiasc src gnome org>]

commit 5f64b6a2be1521dd80d2b20b005fd76e51df8851
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Apr 15 20:10:40 2013 -0400

    Include string.h
    
    Required to build against libpng 1.6,
    https://bugzilla.gnome.org/review?bug=698093

 gdk-pixbuf/io-png.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gdk-pixbuf/io-png.c b/gdk-pixbuf/io-png.c
index fd8ac56..c8c5597 100644
--- a/gdk-pixbuf/io-png.c
+++ b/gdk-pixbuf/io-png.c
@@ -26,6 +26,7 @@
 #include "config.h"
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <png.h>
 #include "gdk-pixbuf-private.h"