Handle padding in end-of-carousel scroll limit

My recent change to support padding also necessitates a change to the
touch handlers, when they work out whether we can scroll any further.
It's now necessary to compare the child's right edge with the inner
boundary, not the outer width.

Author: orac

viewflow/src/org/taptwo/android/widget/ViewFlow.java

@@ -296,7 +296,8 @@ public boolean onInterceptTouchEvent(MotionEvent ev) {
 				} else if (deltaX > 0) {
 					final int availableToScroll = getChildAt(
 							getChildCount() - 1).getRight()
-							- scrollX - getChildWidth();
+							- getPaddingRight() - getHorizontalFadingEdgeLength()
+							- scrollX - getWidth();
 					if (availableToScroll > 0) {
 						scrollBy(Math.min(availableToScroll, deltaX), 0);
 					}
@@ -394,6 +395,7 @@ public boolean onTouchEvent(MotionEvent ev) {
 				} else if (deltaX > 0) {
 					final int availableToScroll = getChildAt(
 							getChildCount() - 1).getRight()
+							- getPaddingRight() - getHorizontalFadingEdgeLength()
 							- scrollX - getChildWidth();
 					if (availableToScroll > 0) {
 						scrollBy(Math.min(availableToScroll, deltaX), 0);