Fix Sprite & GraphicsComponent copy constructors leaving some members uninitialized (#166)

* Fix Sprite copy constructor (corner colors)

* Also add change to changelog

* [GraphicsComponent] Bugfix: Initialize m_scissorRect in copy ctor

* Add change to changelog

* Move GraphicsComponent fix change to correct section in Changelog

* Use default copy constructor for Sprite

include/Nazara/Graphics/Sprite.hpp

@@ -29,7 +29,7 @@ namespace Nz
 			inline Sprite();
 			inline Sprite(MaterialRef material);
 			inline Sprite(Texture* texture);
-			inline Sprite(const Sprite& sprite);
+			Sprite(const Sprite&) = default;
 			Sprite(Sprite&&) = delete;
 			~Sprite() = default;