Fix for recent kdtree py module with MSVC

also remove submodule includes from mathutils.h

source/blender/python/mathutils/mathutils.c

@@ -474,6 +474,12 @@ static struct PyModuleDef M_Mathutils_module_def = {
 	NULL,  /* m_free */
 };
 
+
+/* submodules only */
+#include "mathutils_geometry.h"
+#include "mathutils_kdtree.h"
+#include "mathutils_noise.h"
+
 PyMODINIT_FUNC PyInit_mathutils(void)
 {
 	PyObject *mod;

source/blender/python/mathutils/mathutils.h

@@ -55,10 +55,10 @@ typedef struct {
 #include "mathutils_Euler.h"
 #include "mathutils_Color.h"
 
-/* utility submodules */
-#include "mathutils_geometry.h"
-#include "mathutils_noise.h"
-#include "mathutils_kdtree.h"
+// /* utility submodules */
+//
+//
+//#include "mathutils_kdtree.h"
 
 PyObject *BaseMathObject_owner_get(BaseMathObject *self, void *);
 PyObject *BaseMathObject_is_wrapped_get(BaseMathObject *self, void *);

source/blender/python/mathutils/mathutils_geometry.c

@@ -27,6 +27,7 @@
 
 #include <Python.h>
 
+#include "mathutils.h"
 #include "mathutils_geometry.h"
 
 /* Used for PolyFill */

source/blender/python/mathutils/mathutils_geometry.h

@@ -27,8 +27,6 @@
  *  \ingroup pymathutils
  */
 
-#include "mathutils.h"
-
 PyMODINIT_FUNC PyInit_mathutils_geometry(void);
 
 #endif /* __MATHUTILS_GEOMETRY_H__ */

source/blender/python/mathutils/mathutils_kdtree.c

@@ -35,7 +35,9 @@
 #include "BLI_kdtree.h"
 
 #include "../generic/py_capi_utils.h"
+
 #include "mathutils.h"
+#include "mathutils_kdtree.h"  /* own include */
 
 #include "BLI_strict_flags.h"
 

source/blender/python/mathutils/mathutils_kdtree.h

@@ -26,7 +26,7 @@
 #ifndef __MATHUTILS_KDTREE_H__
 #define __MATHUTILS_KDTREE_H__
 
-PyObject *PyInit_mathutils_kdtree(void);
+PyMODINIT_FUNC PyInit_mathutils_kdtree(void);
 
 extern PyTypeObject PyKDTree_Type;
 

source/blender/python/mathutils/mathutils_noise.h

@@ -27,8 +27,6 @@
 #ifndef __MATHUTILS_NOISE_H__
 #define __MATHUTILS_NOISE_H__
 
-#include "mathutils.h"
-
 PyMODINIT_FUNC PyInit_mathutils_noise(void);
 PyMODINIT_FUNC PyInit_mathutils_noise_types(void);
 PyMODINIT_FUNC PyInit_mathutils_noise_metrics(void);