Add PyObject_HEAD to clang-format

.clang-format

@@ -16,6 +16,8 @@ ColumnLimit: 100
 SpaceAfterTemplateKeyword: true
 Standard: Cpp11
 StatementMacros:
+- PyObject_HEAD
+- PyObject_VAR_HEAD
 - vtkAbstractTypeMacro
 - vtkTypeMacro
 - vtkBaseTypeMacro

Utilities/PythonInterpreter/vtkPythonStdStreamCaptureHelper.h

@@ -26,7 +26,8 @@
 
 struct vtkPythonStdStreamCaptureHelper
 {
-  PyObject_HEAD int softspace; // Used by print to keep track of its state.
+  PyObject_HEAD
+  int softspace; // Used by print to keep track of its state.
   bool DumpToError;
 
   void Write(const char* string)

Wrapping/PythonCore/PyVTKObject.h

@@ -57,13 +57,14 @@ public:
 // plus a pointer to the associated vtkObjectBase and PyVTKClass.
 struct PyVTKObject
 {
-  PyObject_HEAD PyObject* vtk_dict; // each object has its own dict
-  PyObject* vtk_weakreflist;        // list of weak references via python
-  PyVTKClass* vtk_class;            // information about the class
-  vtkObjectBase* vtk_ptr;           // pointer to the C++ object
-  Py_ssize_t* vtk_buffer;           // ndims, shape, strides for Py_buffer
-  unsigned long* vtk_observers;     // used to find our observers
-  unsigned int vtk_flags;           // flags (see list above)
+  PyObject_HEAD
+  PyObject* vtk_dict;           // each object has its own dict
+  PyObject* vtk_weakreflist;    // list of weak references via python
+  PyVTKClass* vtk_class;        // information about the class
+  vtkObjectBase* vtk_ptr;       // pointer to the C++ object
+  Py_ssize_t* vtk_buffer;       // ndims, shape, strides for Py_buffer
+  unsigned long* vtk_observers; // used to find our observers
+  unsigned int vtk_flags;       // flags (see list above)
 };
 
 extern VTKWRAPPINGPYTHONCORE_EXPORT PyGetSetDef PyVTKObject_GetSet[];

Wrapping/PythonCore/PyVTKReference.h

@@ -30,7 +30,8 @@
 // type int or float.
 struct PyVTKReference
 {
-  PyObject_HEAD PyObject* value;
+  PyObject_HEAD
+  PyObject* value;
 };
 
 extern PyTypeObject PyVTKReference_Type;

Wrapping/PythonCore/PyVTKSpecialObject.h

@@ -60,7 +60,8 @@ public:
 // own structs.
 struct PyVTKSpecialObject
 {
-  PyObject_HEAD PyVTKSpecialType* vtk_info;
+  PyObject_HEAD
+  PyVTKSpecialType* vtk_info;
   void* vtk_ptr;
   long vtk_hash;
 };