Music legend Cyndi Lauper’s son landed himself in hot water after he was allegedly caught with a gun and drugs in the proximity of a nearby shooting in New York’s Harlem section this week, RadarOnline.com has learned. Police had scoped the scene after a 24-year-old man was shot in the leg on 135 W. 112th St. at around 7:15 PM on Wednesday, the NYPD told RadarOnline.com. Paramedics responded and took the victim to Mount Sinai Morningside. He is in stable condition. Officers found 26-year-old Declyn “Dex” Lauper in possession of a loaded gun nearby and he was arrested, but we should note that he…