Alek2ander weekly runtimes fixing

Fixes runtimes related to clown_ore -> bananium changes (fixes #5554).
Fixes runtimes related to security records (fixes #5552).
Changing the name in the security database now also change it in the general database.
Exactly, the _mineral_ var was used for setting the icon and the icon state is _clown*_.
I've aligned the _false_walls_ code with the _walls_ one by defining a walltype var, instead of adding an artificial istype.