From faa3ef13cd10dc485400443da2a96fae0b020252 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B0=D0=B2=D1=80=D1=91=D0=BD=D0=BE=D0=B2=20=D0=90?=
 =?UTF-8?q?=D0=BD=D1=82=D0=BE=D0=BD?= <lavrton@gmail.com>
Date: Fri, 28 Feb 2014 00:07:29 +0800
Subject: [PATCH] fix #431

---
 src/DragAndDrop.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/DragAndDrop.js b/src/DragAndDrop.js
index 80f86c4e..7579a492 100644
--- a/src/DragAndDrop.js
+++ b/src/DragAndDrop.js
@@ -95,11 +95,14 @@
     Kinetic.Node.prototype._setDragPosition = function(evt) {
         var dd = Kinetic.DD,
             pos = this.getStage().getPointerPosition(),
-            dbf = this.getDragBoundFunc(),
-            newNodePos = {
-                x: pos.x - dd.offset.x,
-                y: pos.y - dd.offset.y
-            };
+            dbf = this.getDragBoundFunc();
+        if (!pos) {
+            return;
+        }
+        var newNodePos = {
+            x: pos.x - dd.offset.x,
+            y: pos.y - dd.offset.y
+        };
 
         if(dbf !== undefined) {
             newNodePos = dbf.call(this, newNodePos, evt);