VEHICLES & SIC & FREQ JAMMING & GRENADES
Backrooms were not being considered as part of the SIC deadzone, even if the vehicle was in a deadzone location. I've resolved this.
I've also made it so both backrooms and frontrooms of vehicles first defer to the freq jamming signal in the room the vehicle is in, and then check their own jamming (in case someone dropped a GSD grenade in the front or back of a vehicle) and also check the SIC amp / deamp signal so that if one of those is installed and active it takes that into account as well.
This should result in a much more 'as expected' SIC / signal experience.
