Fix leaks from g_list_model_get_item
Review Request #2377 — Created March 22, 2023 and submitted
It returns a new reference, which needs to be unref'd.
Compiled only, and ran tests, though these issues didn't show up in valgrind anyway.
| Summary | ID |
|---|---|
| befa0ac2c65c66e2660712d9ebd7e2421d376007 |
