Minor fixes/clarifications for previous patch.

        for (int i = 0; i < count; i++) {

            if (skipIndex == i) continue;

            // touchMajor/Minor are axes of an ellipse; average them together and

            // convert the resulting 'diameter' into a radius.

            // Average touch major and touch minor and convert the resulting diameter into a radius.

            final float touchSize = (event.getTouchMajor(i) + event.getTouchMinor(i)) / 4;

            devSumX += Math.abs(event.getX(i) - focusX) + touchSize;

            devSumY += Math.abs(event.getY(i) - focusY) + touchSize;

            mPrevSpanY = mCurrSpanY = spanY;

            mInitialSpan = mPrevSpan = mCurrSpan = span;

        }

        if (!mInProgress && span > mMinSpan &&

        if (!mInProgress && span >= mMinSpan &&

                (wasInProgress || Math.abs(span - mInitialSpan) > mSpanSlop)) {

            mPrevSpanX = mCurrSpanX = spanX;

            mPrevSpanY = mCurrSpanY = spanY;

    <integer name="config_multiuserMaximumUsers">1</integer>

    <!-- Minimum span needed to begin a touch scaling gesture.

         If the span is equal to or greater than this size, a scaling gesture

         will begin, where supported. (See android.view.ScaleGestureDetector)

         This also takes into account the size of any active touch points.

         Devices with screens that deviate too far from their assigned density

         bucket should consider tuning this value in a device-specific overlay. -->

         bucket should consider tuning this value in a device-specific overlay.

         For best results, care should be taken such that this value remains

         larger than the minimum reported touchMajor/touchMinor values

         reported by the hardware. -->

    <dimen name="config_minScalingSpan">25mm</dimen>

</resources>