TD: [skip ci] fix build failure with MSVC

The compiler requires the class declaration of LineSet in order to determine its size

src/Mod/TechDraw/App/DrawGeomHatch.h

@@ -24,6 +24,7 @@
 #define TechDraw_DrawGeomHatch_h_
 
 #include <Mod/TechDraw/TechDrawGlobal.h>
+#include <Mod/TechDraw/App/HatchLine.h>
 
 #include <App/DocumentObject.h>
 #include <App/FeaturePython.h>

src/Mod/TechDraw/App/DrawViewSection.h

@@ -40,6 +40,7 @@
 #include <gp_Ax2.hxx>
 
 #include "DrawViewPart.h"
+#include "HatchLine.h"
 
 
 class Bnd_Box;