Block the "silent aim" cheat

[serthy]

serthy how did u test it? U got the silent aim hack?

Hell no...
Just implemented an aiming logic to the bots so they shoot eachother.
Then decreasing the distance calculations until no warning about silent aim is popping up any longer.
I've tested this on the stock map Brecourt (pretty large) and it seems to be OK.
Improvements and critics are welcomened ;-)