Multiple doors on the start screen are all playing the shutting animation.

[TCH68k]

Steps to reproduce:

1. Put multiple doors on to the start screen.
2. Play the level.
3. All of them will play the shutting animation.

This is different from the original game, where only the "first" door will do this. (First as in first in from top to down and from left to right order.)

Illustration video for original game: http://oscomp.hu/depot/pop_multiple_doors_at_start.mkv
Illustration video for SDLPoP: http://oscomp.hu/depot/sdlpop_multiple_doors_at_start.mkv

Note: The exit will be rendered useless in the original game too, what is a conceptional flaw. I don't know if that can be fixed. I mean, it of course can be fixed in SDLPoP, but the levels made in that way will not be playable in the original game.