Added the S-42 class to the game

[Willem]

Since the 1.1 patch the S-42 class was added (it looks like the original S class but it got a AA gun) actually it works correctly only in the fast missions when I start a new career (it is available when you choose 1942 as start date and Brisbane as port) and choose it I always have the original S class without any AA gun.If someone know how to fix it plz tell me thx.