Implemented load audio and music files as well the basic audio playback

functionality.

src/Renderer.c

@@ -68,15 +68,15 @@ SDL_Texture *load_texture(const Renderer *renderer, const char *path) {
   return IMG_LoadTexture(renderer->SDL_base_renderer, path);
 }
 
-void destroy_renderer(Renderer *renderer) {
-  if (renderer) {
-    if (renderer->SDL_base_renderer) {
-      SDL_DestroyRenderer(renderer->SDL_base_renderer);
-      renderer->SDL_base_renderer = NULL;
+void destroy_renderer(Renderer **renderer) {
+  if (*renderer) {
+    if ((*renderer)->SDL_base_renderer) {
+      SDL_DestroyRenderer((*renderer)->SDL_base_renderer);
+      (*renderer)->SDL_base_renderer = NULL;
     }
 
-    free(renderer);
-    renderer = NULL;
+    free(*renderer);
+    *renderer = NULL;
 
 #ifdef DEBUG_ENGINE
     printf("Renderer destroyed successfully\n");