A DePaul University College of Law professor did not waive attorney-client privilege by using the school’s email system to communicate with her personal lawyer, a federal judge has held.In a written opinion Sunday, U.S. District Judge Matthew F. Kennelly denied DePaul’s motion to compel Sumi Cho to turn over her online communications with her former lawyer concerning her discrimination claims against the university.Whether an individual waived the attorney-client privilege by using his or her employee email account depends …