Create security attributes when running as NT or later.

dlls/shlwapi/thread.c

diff --git a/dlls/shlwapi/thread.c b/dlls/shlwapi/thread.c
index 386488f..0a3f187 100644
--- a/dlls/shlwapi/thread.c
+++ b/dlls/shlwapi/thread.c
@@ -66,7 +66,7 @@
 
   TRACE("(%p,%p)\n", lpAttr, lpSec);
 
-  if (0) /* FIXME: SHWAPI_OsIsUnicode, as per shell32 */
+  if (!(GetVersion() & 0x80000000))  /* NT */
   {
     if (!lpSec || !lpAttr)
       return NULL;