fixing compilation error and some warnings

sources/PPU/Background.hpp

@@ -9,6 +9,7 @@
 #include <array>
 #include <vector>
 #include "../Models/Vector2.hpp"
+#include "../Ram/Ram.hpp"
 
 namespace ComSquare::PPU
 {
@@ -24,6 +25,8 @@ namespace ComSquare::PPU
 		uint16_t _graphicVramAddress;
 		std::array<std::array<uint32_t, 1024>, 1024> _buffer;
 
+		std::shared_ptr<Ram::Ram> vram;
+		std::shared_ptr<Ram::Ram> cgram;
 		//! @brief Draw a tile on the screen at x y pos
 		void drawBgTile(uint16_t data, Vector2<int> pos);
 		//! @brief Get a palette from the number of the palette (0 - 7)