Replace WaitForSingleObject with WaitForSingleObjectEx,
for better WinRT compatibility.
diff --git a/Python/thread_nt.h b/Python/thread_nt.h
index 938bf1e..bd604fb 100644
--- a/Python/thread_nt.h
+++ b/Python/thread_nt.h
@@ -130,7 +130,7 @@
 DWORD
 EnterNonRecursiveMutex(PNRMUTEX mutex, DWORD milliseconds)
 {
-    return WaitForSingleObject(mutex, milliseconds);
+    return WaitForSingleObjectEx(mutex, milliseconds, FALSE);
 }
 
 BOOL