Sebastien Loriot 9ec37162fe Lab: Suppress warning (#9384) ...

## Summary of Changes

Suppress
[warning](https://cgal.geometryfactory.com/CGAL/testsuite/CGAL-6.2-Ic-134/Lab_Demo/TestReport_lrineau_Ubuntu-latest-GCC6-CXX1z.gz)
issued by gcc.
```
include/CGAL/Three/Viewer_interface.h:42:21: warning: defining ‘CGAL::Three::Viewer_interface’, which previously failed to be complete in a SFINAE context [-Wsfinae-incomplete=]
   42 | class VIEWER_EXPORT Viewer_interface : public CGAL::QGLViewer{
      |                     ^~~~~~~~~~~~~~~~
```

## Release Management

* Affected package(s): Lab
* License and copyright ownership:  unchanged

2026-04-09 17:55:44 +02:00

..

CGAL

Lab: Suppress warning (#9384)

2026-04-09 17:55:44 +02:00