[glib] gwin32.c: Fix build on MinGW

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

commit 786b4c8b8782e8ce62085595a8a87838307af8ba
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Tue Jan 5 15:08:18 2016 +0800

    gwin32.c: Fix build on MinGW
    
    Apparently unlike mingw-w64 and Visual Studio, MinGW does not come with
    winternl.h, which defines NTSTATUS, so we need to include ntdef.h instead
    on MinGW for NTSTATUS.
    
    Based on patch by Cédric Krier.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=756875

 glib/gwin32.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/glib/gwin32.c b/glib/gwin32.c
index 4c89651..0a9b2cf 100644
--- a/glib/gwin32.c
+++ b/glib/gwin32.c
@@ -59,6 +59,9 @@
 #ifdef _MSC_VER
 #pragma comment (lib, "ntoskrnl.lib")
 #endif
+#elif defined (__MINGW32__)
+/* mingw-w64, not MinGW, has winternl.h */
+#include <ntdef.h>
 #else
 #include <winternl.h>
 #endif