Canister will close valve when tank ejected
Canister will close valve when tank ejected

I wonder why nobody did it before.

Conflicts:
	code/game/machinery/atmoalter/canister.dm

ZomgPonies/Paradise64,ZomgPonies/Paradise64,ZomgPonies/Paradise64,ZomgPonies/Paradise64,ZomgPonies/Paradise64,ZomgPonies/Paradise64