Gap generator bug when going from player to observer

[Belonit]

CnCNet/yr-patches#14
There's a current bug where if you are a player, but then lose and turn into an observer, gap generators still work, instead of revealing the shroud around it.

When a player turns into an observer gap generators should not be working and we should be able to see the entire map, as how a normal observer would be able to see the whole map upon load in.