...and thus consistent with Timer::Get/SetTimeout since
9c7016b5 "Scheduler: Changed uLong to
uInt32/uInt64."  Otherwise, at least JunitTest_forms_unoapi on 32-bit Linux
would stay busy forever in vcl::Cursor::ImplTimerHdl, alternating among
ImplRestore() and ImplDraw().

Change-Id: Ic3fd349344c105078b52749ca85559fce485d0c4