Talk about chutzpah! A development company is thinking about suing Florida and the city of Riviera Beach for refusing to use eminent domain to provide land for upscale condominiums and a marina. Viking Inlet Harbor Properties was assured the city would condemn a number of working-class homes, but the city council had second thoughts. Now the company fears the $50 million it has already spent acquiring other lots will go to waste. “I’m stuck with these properties but can’t develop them because I can’t fill in the puzzle pieces,” said Mike Clark, president of the development company’s real-estate division. Hence the possible lawsuit.