new method of pack loading, assume data or data.btw in root to point to all other

src/twn_util.c

@@ -191,6 +191,8 @@ void textures_dump_atlases(void) {
 
         SDL_SaveBMP_RW(ctx.texture_cache.atlas_surfaces[i], handle, true);
         log_info("Dumped atlas %zu to %s", i, buf);
+
+        SDL_free(buf);
     }
 }