Fem: [skip ci] include Python.h before vtk headers to fix a warning with clang/MSYS2

src/Mod/Fem/App/FemPostFilter.cpp

@@ -23,6 +23,7 @@
 #include "PreCompiled.h"
 
 #ifndef _PreComp_
+# include <Python.h>
 # include <vtkPointData.h>
 #endif
 

src/Mod/Fem/App/FemPostPipeline.cpp

@@ -23,6 +23,7 @@
 #include "PreCompiled.h"
 
 #ifndef _PreComp_
+# include <Python.h>
 # include <vtkAppendFilter.h>
 # include <vtkDataSetReader.h>
 # include <vtkImageData.h>

src/Mod/Fem/App/FemPostPipelinePyImp.cpp

@@ -21,6 +21,9 @@
  ***************************************************************************/
 
 #include "PreCompiled.h"
+#ifndef _PreComp_
+# include <Python.h>
+#endif
 
 #include <Base/FileInfo.h>
 

src/Mod/Fem/App/FemVTKTools.cpp

@@ -28,6 +28,7 @@
 # include <cstdlib>
 # include <map>
 # include <memory>
+# include <Python.h>
 
 # include <SMESH_Mesh.hxx>
 # include <SMESHDS_Mesh.hxx>

src/Mod/Fem/App/PropertyPostDataObject.cpp

@@ -23,6 +23,7 @@
 #include "PreCompiled.h"
 
 #ifndef _PreComp_
+# include <Python.h>
 # include <vtkCompositeDataSet.h>
 # include <vtkMultiBlockDataSet.h>
 # include <vtkMultiPieceDataSet.h>