Mechanic Fix (4.0)

As was requested, it now breaks the dialog loop for failure of the mechanic's mission, still works without a new game, same instructions.
This is a simple fix for a devastating glitch that didn't allow you to turn in flash drives to the freedom mechanic if you did his night-only mission, just pop the gamedata folder into your CS directory and go! DON'T WORRY, IT WORKS WITH SA