vim: Import v8.2.4638

* 8.2.4639: not sufficient parenthesis in preprocessor macros
* 8.2.4638: superfluous check if a redraw is needed for 'cursorline'
* 8.2.4637: warning for using uninitialized variable
* 8.2.4636: not using Visual range
* 8.2.4635: tests using null list or dict fail
* 8.2.4634: Vim9: cannot initialize a variable to null_list
* 8.2.4633: Visual range does not work before command modifiers

gitlog.txt

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-* [8.2.4632](https://github.com/vim/vim/commit/f3980dc5d0a5f873cf764b8ba3e567e42259e4e5): using freed memory in flatten()\n* [8.2.4631](https://github.com/vim/vim/commit/347538fad0c503249ebdedd5884c2081257c9f61): crash when switching window in BufWipeout autocommand\n* [8.2.4630](https://github.com/vim/vim/commit/bf269ed0b0bd8414eea7bea17465b2738a9a2b55): 'cursorline' not always updated with 'culopt' is "screenline"\n* [8.2.4629](https://github.com/vim/vim/commit/c6c1ec4da53db9d292fa3dd081c20123f8261178): flattennew() makes a deep copy unnecessarily
+* [8.2.4639](https://github.com/vim/vim/commit/9dac9b1751dd43c02470cc6a2aecaeea27abcc80): not sufficient parenthesis in preprocessor macros\n* [8.2.4638](https://github.com/vim/vim/commit/3e559cd88486ffab6b6fb4e0921b4600d137a617): superfluous check if a redraw is needed for 'cursorline'\n* [8.2.4637](https://github.com/vim/vim/commit/565d1278cbbb7bc927bee207d5c2bc0bb95928fa): warning for using uninitialized variable\n* [8.2.4636](https://github.com/vim/vim/commit/1501b63f8dedbd15ee5bfd9a177e558ffdf0673a): not using Visual range\n* [8.2.4635](https://github.com/vim/vim/commit/501f978288008c2e4e8761858af2e27b14223afd): tests using null list or dict fail\n* [8.2.4634](https://github.com/vim/vim/commit/ec15b1cfdc5faadb529dedda58adf7fc98c839ed): Vim9: cannot initialize a variable to null\_list\n* [8.2.4633](https://github.com/vim/vim/commit/c75bca3ee955ff36ece99a42041733ddea5f45a7): Visual range does not work before command modifiers