State Sen. Serphin Maltese unwittingly honored a Mafia soldier at the reopening of the reputed gangster's Queens bakery, the Daily News has learned. Maltese issued a proclamation and posed for pictures with Vito Grimaldi last week outside Grimaldi's House of Bread on Menahan St. in Ridgewood in the senator's district. T Federal prosecutors identified Grimaldi as a made member of the Bonanno crime family in a 2002 indictment. He later pleaded guilty to racketeering and was sentenced to two years in prison. Maltese was unapologetic yesterday about publicizing the Bonanno baker.