Fix GH-20699: SQLite3Result fetchArray return array|false, null returned

[ndossche]

No description provided.

[devnexen]

definitely a bug and proper fix but just judging it (no test ?)

[ndossche]

The php_sqlite3_error line is never hit in our test suite, and I'm not sure how to trigger it.
This can be observed by placing an abort(); under the case and seeing that every test passes.

[plusminmax]

was something like this

$db = new SQLite3(':memory:');
$db->exec('CREATE TABLE a(b TEXT DEFAULT "oops", UNIQUE(b));');
$pre = $db->prepare('BEGIN;')->execute()->fetchArray();
$db->close();

[ndossche]

Thanks @plusminmax , slightly reduced test committed!

[devnexen]

you might want to print it.