datePickerMultiMonth's _getController returns null - and therefore dpGetSelected() too

What steps will reproduce the problem?
        $("#date-picker").datePickerMultiMonth({
            inline: true,
            numMonths: 4,
            showYearNavigation: false,
            createButton:false,
            displayClose:false,
            closeOnSelect:false,
            selectMultiple:true         
        });
and then something like <a href="#" 
onclick="alert($('#date-picker').dbGetSelected());">selected</a>

What is the expected output? What do you see instead?
Expected: Array of selected dates
Instead: null

Please provide a URL to a page displaying the problem.

What version of the datepicker are you using? On what operating system? And 
Which Browser?
datePicker: 100 2010-06-23 10:45:28
datePickerMultiMonth: ? (downloaded 2010-07-23)
OS: Mac OS X 10.6.4
Browsers: Safari 5.0 and Firefox 3.6

Please provide any additional information below.

Original issue reported on code.google.com by uscheide...@fastforward.ch on 23 Jul 2010 at 5:49

engineer9090909090909090 / jquery-datepicker

datePickerMultiMonth's _getController returns null - and therefore dpGetSelected() too #227