Previously, we'd run the sanity checks if `is_mysql` was not set to `false`. This caused problems for DB drop-ins that didn't define `is_mysql` at all. Instead, we can just check if `is_mysql` is `empty()`. Also fix some unit tests that accidently ran correctly because of the strict `false ===` comparison. Fixes #33501. Built from https://develop.svn.wordpress.org/trunk@34655 git-svn-id: http://core.svn.wordpress.org/trunk@34619 1a063a9b-81f0-0310-95a4-ce76da25c4cd
629 B
629 B