A Cook County electoral board ruled Thursday that one Illinois Supreme Court candidate did not obtain enough signatures to appear on the March primary ballot.Clinton A. Krislov, owner of Krislov & Associates Ltd., said he hasn’t decided whether he will appeal the electoral board’s decision to the Cook County Circuit Court.He was one of eight Democratic candidates who filed to run for the 1st District Supreme Court seat vacated by former justice Charles E. Freeman.“I’ll probably pursue this in …