NEVER-BEFORE-SEEN PHOTOS: A rare look at cuddly side of Koch

Jon Thaler HOW’M I COOING, KID? A cautious Ed Koch marvels over his grandniece Perri Thaler in a family photo taken in Scarsdale in 2001. It’s the Ed Koch you’ve never seen before. The famously pugnacious — and frequently potty-mouthed — pol looks every bit the doting granddad in…