Fixes secondary main power and secondary backup power wires in airlocks

Created by: 9600bauds

Airlocks have two main power lines (aka test wire) and two secondary power lines. However, only one of each of those wires worked when pulsed. This is why the term "test wire" is singular in game lingo: If you use a wirecutter to test the wires, you'll see that there are actually two main power wires, however, only one of them will actually work with a multitool (which is the most popular hacking choice). What does this fix mean? Yes, it will be twice as easy to find the test wire with a multitool, since there will actually be two like there were intended to be. Yes, you will be more likely to find the test wire than the shock wire. I am so, so sorry.