Añadido puntero a la estructura param en las clases necesarias

source/background.cpp

@@ -1,12 +1,13 @@
 #include "background.h"
 
 // Constructor
-Background::Background(SDL_Renderer *renderer, Screen *screen, Asset *asset)
+Background::Background(SDL_Renderer *renderer, Screen *screen, Asset *asset, param_t *param)
 {
     // Copia los punteros
     this->renderer = renderer;
     this->screen = screen;
     this->asset = asset;
+    this->param = param;
 
     // Inicializa variables
     gradientNumber = 0;