Billionaire J.B. Pritzker, an heir to the Hyatt Hotel empire and who was named one of the wealthiest people in the world this week, once pleaded guilty to a misdemeanor charge of writing a “worthless check.”Court records obtained by POLITICO show that Pritzker, who is exploring a run for Illinois governor, pleaded guilty in 1986 to a misdemeanor count of writing a bad check.