patch 9.0.1709: dynamic build with python 3.12 breaks

Problem: dynamic build with python 3.12 breaks
Solution: if_python3.c: Fix building dynamic Python3 interpreter

There are new extern global variables defined in python3 development
files, which types are within python3 library, so they break dynamic
python3 interpret Vim plugin.

Since the variables are used in macro `Py_SIZE` which is used in other
python3 headers, the dummy variables have to defined before including
Python.h.

closes: #12660

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: Zdenek Dohnal <zdohnal@redhat.com>

src/if_python3.c

@@ -68,6 +68,8 @@
 #endif
 
 #define PY_SSIZE_T_CLEAN
+#define PyLong_Type (*py3_PyLong_Type)
+#define PyBool_Type (*py3_PyBool_Type)
 
 #include <Python.h>
 
@@ -271,7 +273,6 @@ static HINSTANCE hinstPy3 = 0; // Instance of python.dll
 # define PyFloat_Type (*py3_PyFloat_Type)
 # define PyNumber_Check (*py3_PyNumber_Check)
 # define PyNumber_Long (*py3_PyNumber_Long)
-# define PyBool_Type (*py3_PyBool_Type)
 # define PyErr_NewException py3_PyErr_NewException
 # ifdef Py_DEBUG
 #  define _Py_NegativeRefcount py3__Py_NegativeRefcount
@@ -449,7 +450,10 @@ static PyTypeObject* py3_PyType_Type;
 static PyTypeObject* py3_PyStdPrinter_Type;
 static PyTypeObject* py3_PySlice_Type;
 static PyTypeObject* py3_PyFloat_Type;
-static PyTypeObject* py3_PyBool_Type;
+PyTypeObject* py3_PyBool_Type;
+# if PY_VERSION_HEX >= 0x030c00b0
+PyTypeObject* py3_PyLong_Type;
+# endif
 static int (*py3_PyNumber_Check)(PyObject *);
 static PyObject* (*py3_PyNumber_Long)(PyObject *);
 static PyObject* (*py3_PyErr_NewException)(char *name, PyObject *base, PyObject *dict);
@@ -625,6 +629,9 @@ static struct
     {"PySlice_Type", (PYTHON_PROC*)&py3_PySlice_Type},
     {"PyFloat_Type", (PYTHON_PROC*)&py3_PyFloat_Type},
     {"PyBool_Type", (PYTHON_PROC*)&py3_PyBool_Type},
+# if PY_VERSION_HEX >= 0x030c00b0
+    {"PyLong_Type", (PYTHON_PROC*)&py3_PyLong_Type},
+# endif
     {"PyNumber_Check", (PYTHON_PROC*)&py3_PyNumber_Check},
     {"PyNumber_Long", (PYTHON_PROC*)&py3_PyNumber_Long},
     {"PyErr_NewException", (PYTHON_PROC*)&py3_PyErr_NewException},

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1709,
 /**/
     1708,
 /**/