Prevent crash when multiple timers are firing

    private void resetTimer(TimerObj t) {

        t.mState = TimerObj.STATE_RESTART;

        t.mTimeLeft = t.mOriginalLength = t.mSetupLength;

        ((TimerListItem) t.mView).stop();

        ((TimerListItem) t.mView).setTime(t.mTimeLeft, false);

        ((TimerListItem) t.mView).set(t.mOriginalLength, t.mTimeLeft, false);

        // when multiple timers are firing, some timers will be off-screen and they will not

        // have Fragment instances unless user scrolls down further. t.mView is null in this case.

        if (t.mView != null) {

            t.mView.stop();

            t.mView.setTime(t.mTimeLeft, false);

            t.mView.set(t.mOriginalLength, t.mTimeLeft, false);

        }

        updateTimersState(t, Timers.TIMER_RESET);

    }