Fixed unit tests after previous include manipulations

src/slic3r/GUI/3DScene.hpp

@@ -6,7 +6,6 @@
 #include "libslic3r/Line.hpp"
 #include "libslic3r/TriangleMesh.hpp"
 #include "libslic3r/Utils.hpp"
-//#include "libslic3r/Model.hpp"
 #include "libslic3r/Geometry.hpp"
 
 #include <functional>

src/slic3r/GUI/Selection.hpp

@@ -3,8 +3,6 @@
 
 #include <set>
 #include "libslic3r/Geometry.hpp"
-//#include "libslic3r/Model.hpp"
-//#include "3DScene.hpp"
 
 
 #if ENABLE_RENDER_SELECTION_CENTER

tests/fff_print/test_print.cpp

@@ -2,6 +2,7 @@
 
 #include "libslic3r/libslic3r.h"
 #include "libslic3r/Print.hpp"
+#include "libslic3r/Layer.hpp"
 
 #include "test_data.hpp"
 

tests/fff_print/test_printobject.cpp

@@ -2,6 +2,7 @@
 
 #include "libslic3r/libslic3r.h"
 #include "libslic3r/Print.hpp"
+#include "libslic3r/Layer.hpp"
 
 #include "test_data.hpp"
 

tests/fff_print/test_support_material.cpp

@@ -1,6 +1,7 @@
 #include <catch2/catch.hpp>
 
 #include "libslic3r/GCodeReader.hpp"
+#include "libslic3r/Layer.hpp"
 
 #include "test_data.hpp" // get access to init_print, etc
 

xs/xsp/PerimeterGenerator.xsp

@@ -3,6 +3,7 @@
 %{
 #include <xsinit.h>
 #include "libslic3r/PerimeterGenerator.hpp"
+#include "libslic3r/Layer.hpp"
 %}
 
 %name{Slic3r::Layer::PerimeterGenerator} class PerimeterGenerator {