From 8a9c219b9d6c1973cd0237524a9526f2257b1a6a Mon Sep 17 00:00:00 2001
From: Paulo Gustavo Veiga <pveiga@wisemapping.com>
Date: Tue, 18 Sep 2012 20:56:51 -0300
Subject: [PATCH] Minor fix.

---
 mindplot/src/main/javascript/Designer.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mindplot/src/main/javascript/Designer.js b/mindplot/src/main/javascript/Designer.js
index 5d71b31f..c8c54296 100644
--- a/mindplot/src/main/javascript/Designer.js
+++ b/mindplot/src/main/javascript/Designer.js
@@ -83,6 +83,9 @@ mindplot.Designer = new Class({
         },
 
         _registerWheelEvents:function () {
+            var workspace = this._workspace;
+            var screenManager = workspace.getScreenManager();
+
             // Zoom In and Zoom Out must active event
             $(document).addEvent('mousewheel', function (event) {
                 // Change mousewheel handling so we let the default