[libgsf] gsf: Add missing include for setlocale

[Morten Welinder <mortenw src gnome org>]

commit d9810508c47b4834697f618c67c5a46d53aef9c7
Author: Kalev Lember <kalevlember gmail com>
Date:   Tue Mar 4 10:07:12 2014 +0100

    gsf: Add missing include for setlocale
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725645

 tools/gsf.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tools/gsf.c b/tools/gsf.c
index a852aae..6d3e68a 100644
--- a/tools/gsf.c
+++ b/tools/gsf.c
@@ -5,6 +5,7 @@
 #include <glib/gi18n.h>
 #include <glib/gstdio.h>
 #include <gio/gio.h>
+#include <locale.h>
 #include <string.h>
 #include <errno.h>