Fixed F12 and Ringslinger bug on Co-op

[KoX3D]

There is a bug or a glitch with ringslinger and F12. If i enter code "ringslinger on" the F12 button stops working in co-op mode. Looking at other players is inaccessible untill i put ringslinger off. Possibly game thinks i'm in a match mode while putting that code in co-op game.

 

[Monster Iestyn]

I can see where this is coming from, ringslinger makes G_RingslingerGametype return true, and thus disable F12 like Match/CTF does.