[issue40737] Fix possible reference leak for sqlite3 initialization

[Erlend Egeberg Aasland]

Change by Erlend Egeberg Aasland <erlend.aasland at innova.no>:


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title: Handle PyModule_AddObject() error correctly in sqlite3 -> Fix possible reference leak for sqlite3 initialization

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40737>
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