Incorrect camera digilines signal position

[cheapie]

Commit a49e4dd seems to have changed the position that the digilines signals emitted by the camera come from. Previously they were emitted at the node that was at the base of the camera, but now they are emitted from the camera itself. This renders the camera nearly useless for its original intended purpose (vehicle detection for traffic signals) as it will no longer transmit signals into the pole, and may also break some other builds.

For the purposes of traffic signals, adding (0,-1,0) to the rules table would resolve the issue, but this may not fix other builds reliant on the previous behavior.