Variant of patch #697613: don't exit the interpreter on a SystemExit
exception if the -i command line option or PYTHONINSPECT environment
variable is given, but break into the interactive interpreter just like
on other exceptions or normal program exit.
 (backport)
diff --git a/Include/pydebug.h b/Include/pydebug.h
index f49a98e..db3b656 100644
--- a/Include/pydebug.h
+++ b/Include/pydebug.h
@@ -8,6 +8,7 @@
 PyAPI_DATA(int) Py_DebugFlag;
 PyAPI_DATA(int) Py_VerboseFlag;
 PyAPI_DATA(int) Py_InteractiveFlag;
+PyAPI_DATA(int) Py_InspectFlag;
 PyAPI_DATA(int) Py_OptimizeFlag;
 PyAPI_DATA(int) Py_NoSiteFlag;
 PyAPI_DATA(int) Py_UseClassExceptionsFlag;