Rat trap wall broke open a vault

[brturn]

I’ve read several reports of dormant monsters breaking out of walls leaving a ‘free’ path into a vault (bypassing the intended entrance through a locked door).

Smaug13 — 07/14/2023 6:11 PM
I recently had one! A rat broke out of a vaults wall in the rat-paralysis trap one. Was a great help too, because I was not prepared for that encounter and could run into that vault for safety
https://discord.com/channels/205277826788622337/205347357745872896/1129535613150969917

Probably caused because one of the valid entrances to some vaults is a statue that bursts open to reveal a monster (and leave behind a path into the vault). Likely need to add a check that only allows embedded monsters in vault walls when the monster is part of the chosen vestibule machine.

https://github.com/tmewett/BrogueCE/tree/master/src/variants/GlobalsBrogue.c @ 319
Statue in the doorway -- bursts to reveal monster

[tmewett]

This is a dup of #325, at the time it was closed as a wontfix since it's kind of fun and not too common? Do we still think that's true?