Merge branch 'nullable' into 'main'
authorMatthias Clasen <mclasen@redhat.com>
Wed, 29 Dec 2021 00:28:09 +0000 (00:28 +0000)
committerMatthias Clasen <mclasen@redhat.com>
Wed, 29 Dec 2021 00:28:09 +0000 (00:28 +0000)
popover: Add missing nullable annotation

Closes #4556

See merge request GNOME/gtk!4295


Trivial merge