ntdll: Do not execute callbacks past DeleteTimer(INVALID_HANDLE_VALUE).

[Joerg-Cyril . Hoehle]

Hi,

>callbacks are running in Wine even after 
>DeleteTimerQueue(INVALID_HANDLE_VALUE).
I've attached to bug #30071 tests that show the bug and fail in unpatched Wine.

Regards,
        Jörg Höhle