Sopapilla Cheesecake

Preheat oven to 375°. Grease a 9"-x-13" baking dish with cooking spray.  In a large bowl, combine cream cheese, sugar, eggs, sour cream, vanilla, and salt. Using a hand mixer, beat all ingredients together until smooth. Press one sheet crescent dough into prepared baking dish, stretching to reach all edges of baking dish. If dough is perforated, pinch all perforations closed. Spread cheesecake mixture in an even layer and top with another layer of crescent dough. Brush top with melted butter and sprinkle with cinnamon sugar.  Bake until crescent is golden and cooked through, 25 to 30 minutes. Let cool and slice into squares.