New Arty Routine

[BigJim]

While I applaud the effort to make the game more interesting I think the new AI arty routine has brought back an old problem that SSI had to fix, namely "borg" arty.

The arty routine for the AI allows instant and always on target correction and in some cases spotting where nothing has moved and it has no LOS.

Please don't ask for a test file since this can be easliy seen in any game you wish to set up.