Modern style cast.

done as part of CURA-9533

src/TreeSupport.cpp

@@ -94,7 +94,7 @@ void TreeSupport::drawCircles(SliceDataStorage& storage, const std::vector<std::
     const size_t z_distance_bottom_layers = round_up_divide(z_distance_bottom, layer_height) > 0 ? round_up_divide(z_distance_bottom, layer_height) : 1;
     const double diameter_angle_scale_factor = sin(mesh_group_settings.get<AngleRadians>("support_tree_branch_diameter_angle")) * layer_height / branch_radius; // Scale factor per layer to produce the desired angle.
     const coord_t max_radius = mesh_group_settings.get<coord_t>("support_tree_max_diameter");
-    const double max_relative_expansion = double(max_radius) / branch_radius - 1.0;
+    const double max_relative_expansion = static_cast<double>(max_radius) / branch_radius - 1.0;
     const coord_t line_width = mesh_group_settings.get<coord_t>("support_line_width");
     const coord_t minimum_tip_radius = line_width / 2 * 1.5; // End up slightly wider than 1 line width in the tip.
     const size_t tip_layers = (branch_radius - minimum_tip_radius) / layer_height; // The number of layers to be shrinking the circle to create a tip. This produces a 45 degree angle.