Lynn – A homeless man trying to keep warm Saturday was found burned to death in a pickup truck at a Lynnway parking lot, authorities said.The unidentified man was pronounced dead shortly after 10 a.m., according to Steve O’Connell, spokesperson for the Essex District Attorney’s Office.”It is my understanding that the gentleman was trying to keep warm, and it appears he started a fire in the cab of the truck,” O’Connell said.The man was found in the lot behind Simons Uniform on the southbound side of the road near Blossom Street.Foul play is not suspected.nDan O’Brien