[glib] gdate: Suppress string format literal warning

[Colin Walters <walters src gnome org>]

commit 0817af40e8c74c721c30f6ef482b1f53d12044c7
Author: coypu <coypu sdf org>
Date:   Mon Feb 8 00:06:06 2016 +0200

    gdate: Suppress string format literal warning
    
    Newer versions of GCC emit an error here, but we know it's safe.
    https://bugzilla.gnome.org/761550

 glib/gdate.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/glib/gdate.c b/glib/gdate.c
index 4aece02..cdc735c 100644
--- a/glib/gdate.c
+++ b/glib/gdate.c
@@ -2494,7 +2494,10 @@ g_date_strftime (gchar       *s,
        * recognize whether strftime actually failed or just returned "".
        */
       tmpbuf[0] = '\1';
+      #pragma GCC diagnostic push
+      #pragma GCC diagnostic ignored "-Wformat-nonliteral"
       tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm);
+      #pragma GCC diagnostic pop
 
       if (tmplen == 0 && tmpbuf[0] != '\0')
         {