Fixes various runtimes (squashed)

- Fixes runtime in pod lock busters
- Fixes possessed object examination runtime
- Fixes runtime when following a destroyed mob
- Fixes to_chat runtimes from involuntary emotes
- Fixes runtimes from invalid clothing IDs
- Fixes runtime caused by wirecutting non-humans
- Fixes runtime when setting up malf AI antaghuds
- Fixes runtimes in sensory destruction reagents
- Fixes runtime caused by clientless ghosts
- Fixes antag hud runtime in autotraitor generation
- Fixes welding tool shutoff runtime
- Fixes runtime in laptops' welcome program
- Fixes to_chat runtime from mech sound effect
- Fixes runtimes in camera-using NanoUIs
- Fixes to_chat runtimes in resisting held mobs
- Fixes headless mob skeletonizing/husking runtimes
- Fixes non-mob add_logs runtime

code/modules/computer3/computers/welcome.dm

@@ -10,7 +10,6 @@
 
 
 	interact()
-		usr.set_machine(src)
 		if(!interactable())
 			return
 		var/dat = ""