Adjust seige times for cities?

[Pode]

This was suggested as a possible workaround for the save/load seige breaking bug. Alas, I have no idea if it's possible or how to do it. Does anyone know of a way to set the basic seige times to one turn for all cities? Do we even know how the length of a seige is determined?

[Simetrical]

Well, the descriptions for walls above a palisade say that they have grain stores, to increase siege length. Since these stores aren't mentioned in descr_building, they may be hard-coded, and perhaps renaming all the walls would remove them. Then again, they're more likely hardcoded to wall_level than to the specific building name.

-Simetrical