CCTVRecord's own s32 `pad` (the look-at pad) shadows the inherited
ObjectRecord `pad` (mount pad) under IDO. The PC struct renamed it
`lookpad` to satisfy GCC, which silently re-pointed setupCctv's reads at
the mount pad, so every camera's look vector was its lens offset and the
lens faced the wall. Read `lookpad` on PC (#ifdef PORT, A1 class);
matches PD's setupCreateCctv (lookatpadnum). User-verified vs 1964,
golden gate 3/3. Porting-notes gains the duplicate-member rename trap.