headers/shlwapi: Change `QITAB.dwOffset` to `DWORD` for Windows 10 RS2+

It was an `int` up to Windows 10 RS1 (10.0.14393.0), but has been changed
to `DWORD` since RS2 (10.0.15063.0).

Reported-by: Cao GH <driver1998.ms@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-headers/include/shlwapi.h

diff --git a/mingw-w64-headers/include/shlwapi.h b/mingw-w64-headers/include/shlwapi.h
index dc10c23..131f56a 100644
--- a/mingw-w64-headers/include/shlwapi.h
+++ b/mingw-w64-headers/include/shlwapi.h
@@ -1177,7 +1177,11 @@
 
 typedef struct {
   const IID *piid;
+#if (NTDDI_VERSION >= NTDDI_WIN10_RS2)
+  DWORD dwOffset;
+#else
   int dwOffset;
+#endif
 } QITAB, *LPQITAB;
 typedef const QITAB *LPCQITAB;