A pair of siblings who claim their late father’s attorney’s negligence cost them significant legal fees do not have a legal malpractice case against the attorney, a state appellate panel ruled.Ilhan Uskup and Timur Uskup filed a legal malpractice action against Joseph C. Johnson, sole practitioner of Joseph C. Johnson, P.C., in Cook County Circuit Court that claimed he was negligent in drafting trust documents for their deceased father Ergin Uskup.The siblings alleged the trust documents contained ambiguous …