add minimal support for new tp_finalize type slot in Py3.4 to prevent C compiler warnings

Cython/Compiler/TypeSlots.py

@@ -788,6 +788,7 @@ slot_table = (
     EmptySlot("tp_weaklist"),
     EmptySlot("tp_del"),
     EmptySlot("tp_version_tag", ifdef="PY_VERSION_HEX >= 0x02060000"),
+    EmptySlot("tp_finalize", ifdef="PY_VERSION_HEX >= 0x030400a1 && defined(Py_TPFLAGS_HAVE_FINALIZE)"),
 )
 
 #------------------------------------------------------------------------------------------

Cython/Utility/CythonFunction.c

@@ -634,6 +634,9 @@ static PyTypeObject __pyx_CyFunctionType_type = {
 #if PY_VERSION_HEX >= 0x02060000
     0,                                  /*tp_version_tag*/
 #endif
+#if PY_VERSION_HEX >= 0x030400a1 && defined(Py_TPFLAGS_HAVE_FINALIZE)
+    0,                                  /*tp_finalize*/
+#endif
 };
 
 
@@ -1079,6 +1082,9 @@ static PyTypeObject __pyx_FusedFunctionType_type = {
 #if PY_VERSION_HEX >= 0x02060000
     0,                                  /*tp_version_tag*/
 #endif
+#if PY_VERSION_HEX >= 0x030400a1 && defined(Py_TPFLAGS_HAVE_FINALIZE)
+    0,                                  /*tp_finalize*/
+#endif
 };
 
 static int __pyx_FusedFunction_init(void) {

Cython/Utility/Generator.c

@@ -608,6 +608,9 @@ static PyTypeObject __pyx_GeneratorType_type = {
 #if PY_VERSION_HEX >= 0x02060000
     0,                                  /*tp_version_tag*/
 #endif
+#if PY_VERSION_HEX >= 0x030400a1 && defined(Py_TPFLAGS_HAVE_FINALIZE)
+    0,                                  /*tp_finalize*/
+#endif
 };
 
 static __pyx_GeneratorObject *__Pyx_Generator_New(__pyx_generator_body_t body,