[python-win32] PyIMAPIProp.GetPropList() and Py_None ref count

[Nick Czeczulin]

I noticed that every call to PyIMAPIProp.GetPropList() causes the ref count for 
Py_None to increase by one. Can someone comment on whether the following patch 
seems correct, or if more might be needed?

Thanks,
-nick

--- a/com/win32comext/mapi/src/mapilib.i
+++ b/com/win32comext/mapi/src/mapilib.i
@@ -501,6 +501,8 @@
 }

 %typemap(python,argout) SPropTagArray **OUTPUT {
+ if ($target == Py_None)
+  Py_DECREF($target);
  $target = PyMAPIObject_FromSPropTagArray(*$source);
  if ($target==NULL) {
   $cleanup;

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