'undefined' is null or not an object in jquery 1.4.2

I am using jquery 1.4.2 version file  . In IE 8 I am recieving this error 'undefined' is null or not an object. I tried to debug the file and found Line 1920 is causing the issue :

var events = jQuery.data(this, "events"), handlers = events[event.type];

here events is coming undefined . so I Change that to: 

var events = jQuery.data(this, "events") || {}, handlers = events[event.type];