DarkCastle: Fixed object duplication and solidmasks in some decoration objects
Copy static variables assigned in Objects.c to the scensario script to avoid problems in savegames.

Static variables in Objects.c are problematic because Objects.c is deleted in savegames.
Implement PLRZOOM_Set flag to allow setting current zoom and limits in the same call.
Added script function GetPlayerZoomLimits (#1071).