Pass stub object on handleDragEnd to prevent crash

Author: STRML

lib/draggable.js

@@ -518,7 +518,7 @@ module.exports = React.createClass({
     if(e.targetTouches){
       this.setState({touchIdentifier: e.targetTouches[0].identifier});
     }
-    
+
     // Make it possible to attach event handlers on top of this one
     this.props.onMouseDown(e);
 
@@ -565,7 +565,7 @@ module.exports = React.createClass({
     // Short circuit if this is not the correct touch event
     if(e.changedTouches && (e.changedTouches[0].identifier != this.state.touchIdentifier)){
      return;
-    } 
+    }
 
     removeUserSelectStyles(this);
 
@@ -609,7 +609,7 @@ module.exports = React.createClass({
 
     // Call event handler. If it returns explicit false, cancel.
     var shouldUpdate = this.props.onDrag(e, createUIEvent(this));
-    if (shouldUpdate === false) return this.handleDragEnd();
+    if (shouldUpdate === false) return this.handleDragEnd({});
 
     // Update transform
     this.setState({