Credit Card Expiration Month Validation

Per the following thread, I was asked to file an issue: http://forum.civicrm.org/index.php/topic,3552.msg15739.html

Error validation for credit card expiration date checks if the month/year combination is valid, but does not check if month is selected. For example, I can select "2008" for the year, leave the month blank, and the code validates it as no problem. Both month and year should be required.