Fix up objects code

scrollbar.go

@@ -335,6 +335,14 @@ func (this scrollbarLayout) Arrange (hints tomo.LayoutHints, boxes []tomo.Box) {
 	
 }
 
+func (this scrollbarLayout) RecommendedHeight (tomo.LayoutHints, []tomo.Box, int) int {
+	return 0
+}
+
+func (this scrollbarLayout) RecommendedWidth (tomo.LayoutHints, []tomo.Box, int) int {
+	return 0
+}
+
 func (this scrollbarLayout) viewportContentRatio () float64 {
 	if this.linked == nil { return 0 }
 	return this.viewportLength() / this.contentLength()