Inserts first successfull qt6 migration Lts/Viewer

qt6-after/qt6-migrated-legatus/Lts/Viewer/SituationMap/MathUtils/geometry_engine.cpp

@@ -45,6 +45,10 @@
 #include <PolylineBuilder.h>
 #include <Polygon.h>
 #include <PolygonBuilder.h>
+#include <Point.h>
+#include <ImmutablePartCollection.h>
+#include <ImmutablePart.h>
+#include <LinearUnit.h>
 
 #include <QPointF>
 #include <QVector>
@@ -378,9 +382,10 @@ QVector<Point3D> GeometryEngine::buffer(AbstractMapObject *mapObj, double distan
 
   // Esri::ArcGISRuntime::GeometryEngine::buffer         -> works for 2D
   // Esri::ArcGISRuntime::GeometryEngine::bufferGeodetic -> works for 2D and 3D!?
+  const Esri::ArcGISRuntime::LinearUnit linearUnit(Esri::ArcGISRuntime::LinearUnitId::Meters);
   const Esri::ArcGISRuntime::Polygon polyline = Esri::ArcGISRuntime::GeometryEngine::bufferGeodetic(esriGeometry,
                                                                                                     distance,
-                                                                                                    Esri::ArcGISRuntime::LinearUnitId::Meters,
+                                                                                                    linearUnit,
                                                                                                     1,
                                                                                                     Esri::ArcGISRuntime::GeodeticCurveType::Geodesic);
   if (polyline.parts().isEmpty())