bug fixes - $dayLength, $modstart, and $status_audit

1. A camelCase issue with $dayLength was not populating the variable.
This was corrected

2. $modstart was breaking the array created by the DaysBetween
function. It was removed.

3. For every case where count($status_audit)=0, multiple PHP Notices
were being written. Line 17 of class_test.php was added to resolve this.