Issue Details

Edges of Polygon_2 as well as Triangulation_2 are not drawn with the examples with VC++

This error got introduced with PR #8850 between CGAL 6.0 and 6.1
Before 59921c1
After 88b0438

I use Qt 6.6.0. @soesau reproduced with Qt 6.6.1 Laurent has no problem with Qt 6.10.1 on Fedora and cgal/main

Source Code

Polygon/examples/Polygon/draw_polygon.cpp

Environment

• Operating system (Windows/Mac/Linux, 32/64 bits): Windows 11
• Compiler: VC 2022
• Release or debug mode: both