Variable VPORT_FALLBACK_CENTER_2DConst

VPORT_FALLBACK_CENTER_2D: Readonly<{ x: 0; y: 0 }> = ...

Frozen 2D/3D placeholders when a VPORT table row omits geometry (partial DXF groups, incomplete DWG decode). Used before AcGePoint2d.copy / AcGePoint3d.copy.