[glib] grand: rand_s is available in mingw64

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 7a8abb20ab5f214d8fb5713420a5dc5fd61ef79c
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Wed Feb 24 11:27:09 2016 +0100

    grand: rand_s is available in mingw64

 glib/grand.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/glib/grand.c b/glib/grand.c
index ac1053d..0cb833e 100644
--- a/glib/grand.c
+++ b/glib/grand.c
@@ -262,8 +262,10 @@ g_rand_new (void)
       seed[3] = getppid ();
     }
 #else /* G_OS_WIN32 */
-  /* rand_s() is only available since Visual Studio 2005 */
-#if defined(_MSC_VER) && _MSC_VER >= 1400
+  /* rand_s() is only available since Visual Studio 2005 and
+   * MinGW-w64 has a wrapper that will emulate rand_s() if it's not in msvcrt
+   */
+#if (defined(_MSC_VER) && _MSC_VER >= 1400) || defined(__MINGW64_VERSION_MAJOR)
   gint i;
 
   for (i = 0; i < G_N_ELEMENTS (seed); i++)