Patch #1537 from Chad Austin
Change GeneratorExit's base class from Exception to BaseException
diff --git a/Objects/exceptions.c b/Objects/exceptions.c
index 4c6a122..cbcda7b 100644
--- a/Objects/exceptions.c
+++ b/Objects/exceptions.c
@@ -424,9 +424,9 @@
 
 
 /*
- *    GeneratorExit extends Exception
+ *    GeneratorExit extends BaseException
  */
-SimpleExtendsException(PyExc_Exception, GeneratorExit,
+SimpleExtendsException(PyExc_BaseException, GeneratorExit,
                        "Request that a generator exit.");