REPORT-84106 fix: sticky bug

(cherry picked from commit c9b2260f04948f87255fbe873297a0051e56a288)

src/core/wrapper/layout/sticky/sticky.vertical.js

@@ -22,7 +22,7 @@ BI.VerticalStickyLayout = BI.inherit(BI.FlexVerticalLayout, {
         }
         if (rowSize !== "fill") {
             var fillIndex;
-            BI.count(0, o.items.length - 1, index => {
+            BI.count(0, o.items.length, index => {
                 if (BI.isNotNull(fillIndex)) {
                     return;
                 }