map.persistence can fail to restore a game if startup.txt has no non-initial commands or story text

[CareyJWilliams]

index.html?persistence=storeName

This runs the game's startup.txt's initial commands to populate the scene_list and create variables before restoring the game. The method determines that all initial commands must have been executed when it encounters a non-initial command. However, if there are no non-initial commands (or ordinary text lines should work as well?) in startup.txt, then the game is never restored. Blank lines are never fed through runCommand, so they don't work either.