pass RenWindow by argument (#1321)

* pass RenWindow to all renderer functions that need it

* pass RenWindow to all rencache functions that need it

src/main.c

@@ -260,7 +260,7 @@ init_lua:
   }
 
   lua_close(L);
-  ren_free_window_resources();
+  ren_free_window_resources(&window_renderer);
 
   return EXIT_SUCCESS;
 }