APPEALS COURT VOIDS STEINGUT INDICTMENT
NYS Sup Ct Appellate Div throws out indictment of Assembly Speaker Stanley Steingut and son Robert, NYC Councilman, on charges of 'corrupt use of position' in offering job in return for campaign contribution; finds that Kings County grand jury that returned indictment lacked jurisdiction; indictment alleged that Speaker and son, who was then candidate for Councilman at Large from Bklyn, agreed to obtain hon city job for Hans Rubenfeld, Bronx haberdasher, in return for $2,500 pol contribution to Robert Steingut's Council campaign (M)