zas: fix zburn /0 runtime, /bay/ fix (https://github.com/Baystation12/Baystation12/commit/3fb37ade172b49f5612eb454c4a8d38d5383d1eb).
Fix turf null runtimes.
Being sure loc is not gonna change while this proc executing.
Replace return by just skipping the turf if it's not valid.
Refactor a little.
Merge pull request #721 from ESwordTheCat/7b#vbri1

Fix atmos runtimes