From 9d3b03d5f759cd9474427c94e718a6aa6e923beb Mon Sep 17 00:00:00 2001
From: Eduardo Lundgren <eduardolundgren@gmail.com>
Date: Fri, 16 Jan 2009 04:27:38 +0000
Subject: Fixed #3841 - check for $.isFunction before trigger

---
 ui/ui.core.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ui/ui.core.js b/ui/ui.core.js
index c77e99999..458857d14 100644
--- a/ui/ui.core.js
+++ b/ui/ui.core.js
@@ -375,7 +375,7 @@ $.widget.prototype = {
 
 		this.element.trigger(event, data);
 
-		return !(callback && callback.call(this.element[0], event, data) === false
+		return !($.isFunction(callback) && callback.call(this.element[0], event, data) === false
 			|| event.isDefaultPrevented());
 	}
 };
-- 
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