From 3f64ec79b72b79dc758435536c1096cb716235ac Mon Sep 17 00:00:00 2001
From: Wu Cheng-Han
Date: Mon, 5 Oct 2015 14:32:31 +0800
Subject: Fixed OT not handle when selection is empty

---
 public/vendor/ot/codemirror-adapter.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'public/vendor/ot/codemirror-adapter.js')

diff --git a/public/vendor/ot/codemirror-adapter.js b/public/vendor/ot/codemirror-adapter.js
index 93727c58..c1601f22 100755
--- a/public/vendor/ot/codemirror-adapter.js
+++ b/public/vendor/ot/codemirror-adapter.js
@@ -247,7 +247,7 @@ ot.CodeMirrorAdapter = (function (global) {
 
     CodeMirrorAdapter.prototype.setSelection = function (selection) {
         var ranges = [];
-        for (var i = 0; i < selection.ranges.length; i++) {
+        for (var i = 0; selection && i < selection.ranges.length; i++) {
             var range = selection.ranges[i];
             ranges[i] = {
                 anchor: this.cm.posFromIndex(range.anchor),
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