Fix width estimate in WheelView.java

WheelView method buildViewForMeasuring() used only first three items to estimate
required width. This is often wrong, as can be seen in the second wheel on the
Time 2 Demo (the next ten entries after 9 are all 1, followed by four 2s).

wheel/src/kankan/wheel/widget/WheelView.java

@@ -864,8 +864,8 @@ private void buildViewForMeasuring() {
 		}
 
 		// add views
-		int addItems = visibleItems / 2;
-		for (int i = currentItem + addItems; i >= currentItem - addItems; i--) {
+		// all items must be included to measure width correctly
+		for (int i = viewAdapter.getItemsCount()-1; i >= 0; i--){
 			if (addViewItem(i, true)) {
 				firstItem = i;
 			}