Fix scrollToItem

Author: Akryum

dist/vue-virtual-scroller.js

@@ -1,7 +1,7 @@
 {
   "name": "vue-virtual-scroller",
   "description": "Smooth scrolling for any amount of data",
-  "version": "0.7.0",
+  "version": "0.7.1",
   "author": {
     "name": "Guillaume Chau",
     "email": "[email protected]"

docs/build.js

@@ -234,10 +234,7 @@ export default {
     scrollToItem (index) {
       let scrollTop
       if (this.itemHeight === null) {
-        scrollTop = 0
-        for (let i = 0; i < index; i++) {
-          scrollTop += this.items[i][this.heightField]
-        }
+        scrollTop = index > 0 ? this.heights[index - 1] : 0
       } else {
         scrollTop = index * this.itemHeight
       }