keyguard: Fix scramble pin

        if (scramblePin) {

            Collections.shuffle(sNumbers);

            // get all children who are NumPadKey's

            LinearLayout bouncer = (LinearLayout) findViewById(R.id.keyguard_bouncer_frame);

            List<NumPadKey> views = new ArrayList<NumPadKey>();

            for (int i = 0; i < bouncer.getChildCount(); i++) {

                if (bouncer.getChildAt(i) instanceof LinearLayout) {

                    LinearLayout nestedLayout = ((LinearLayout) bouncer.getChildAt(i));

                    for (int j = 0; j < nestedLayout.getChildCount(); j++){

                        View view = nestedLayout.getChildAt(j);

                        if (view.getClass() == NumPadKey.class) {

                            views.add((NumPadKey) view);

                        }

                    }

                }

            }

            // reset the digits in the views

            for (int i = 0; i < sNumbers.size(); i++) {

                mViews[(i / 3) + 1][i % 3].setDigit(sNumbers.get(i));

                ((NumPadKey)mViews[(i / 3) + 1][i % 3]).setDigit(sNumbers.get(i));

            }

        }