updated for version 7.3.948
Problem:    Cannot build with Python 2.2
Solution:   Make Python interface work with Python 2.2
            Make 2.2 the first supported version. (ZyX)
diff --git a/src/if_python.c b/src/if_python.c
index 56db2b2..575f822 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -229,6 +229,7 @@
 # define _Py_TrueStruct (*dll__Py_TrueStruct)
 # define PyObject_Init dll__PyObject_Init
 # define PyObject_GetIter dll_PyObject_GetIter
+# define PyObject_IsTrue dll_PyObject_IsTrue
 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02020000
 #  define PyType_IsSubtype dll_PyType_IsSubtype
 # endif
@@ -324,6 +325,7 @@
 static PyObject*(*dll__PyObject_New)(PyTypeObject *, PyObject *);
 static PyObject*(*dll__PyObject_Init)(PyObject *, PyTypeObject *);
 static PyObject* (*dll_PyObject_GetIter)(PyObject *);
+static int (*dll_PyObject_IsTrue)(PyObject *);
 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02070000
 static iternextfunc dll__PyObject_NextNotImplemented;
 # endif
@@ -459,6 +461,7 @@
     {"_PyObject_New", (PYTHON_PROC*)&dll__PyObject_New},
     {"PyObject_Init", (PYTHON_PROC*)&dll__PyObject_Init},
     {"PyObject_GetIter", (PYTHON_PROC*)&dll_PyObject_GetIter},
+    {"PyObject_IsTrue", (PYTHON_PROC*)&dll_PyObject_IsTrue},
 # if defined(PY_VERSION_HEX) && PY_VERSION_HEX >= 0x02070000
     {"_PyObject_NextNotImplemented", (PYTHON_PROC*)&dll__PyObject_NextNotImplemented},
 # endif
@@ -787,7 +790,10 @@
 	 * so the following does both: unlock GIL and save thread state in TLS
 	 * without deleting thread state
 	 */
-	PyEval_SaveThread();
+#ifndef PY_CAN_RECURSE
+	saved_python_thread =
+#endif
+	    PyEval_SaveThread();
 
 	initialised = 1;
     }