Ghosting and Camera FOV.

In NetGhost.cpp around line 388, you can find the following:

camInfo.fov = (F32)(3.1415f / 4.0f);
camInfo.sinFov = 0.7071f;
camInfo.cosFov = 0.7071f;

I'm just curious why these assumptions are being made, but everywhere else that concerns CameraScopeQuery, the real values are used?