Fix infinite scrollToBottom method (#390)

Author: korungg

Diff for: dist/index.js

@@ -848,7 +848,7 @@
           // so we need retry in next event loop until it really at bottom
 
           setTimeout(function () {
-            if (_this.getOffset() + _this.getClientSize() < _this.getScrollSize()) {
+            if (_this.getOffset() + _this.getClientSize() + 1 < _this.getScrollSize()) {
               _this.scrollToBottom();
             }
           }, 3);

Diff for: docs/index.js

@@ -790,7 +790,7 @@
           // so we need retry in next event loop until it really at bottom
 
           setTimeout(function () {
-            if (_this.getOffset() + _this.getClientSize() < _this.getScrollSize()) {
+            if (_this.getOffset() + _this.getClientSize() + 1 < _this.getScrollSize()) {
               _this.scrollToBottom();
             }
           }, 3);

Diff for: src/index.js

@@ -180,7 +180,7 @@ const VirtualList = Vue.component('virtual-list', {
         // maybe list doesn't render and calculate to last range
         // so we need retry in next event loop until it really at bottom
         setTimeout(() => {
-          if (this.getOffset() + this.getClientSize() < this.getScrollSize()) {
+          if (this.getOffset() + this.getClientSize() + 1 < this.getScrollSize()) {
             this.scrollToBottom()
           }
         }, 3)