Merge branch '4627-printing-Unref-old-spool_io-before-setting-new-one' into 'main'
authorMatthias Clasen <mclasen@redhat.com>
Wed, 12 Jan 2022 19:37:18 +0000 (19:37 +0000)
committerMatthias Clasen <mclasen@redhat.com>
Wed, 12 Jan 2022 19:37:18 +0000 (19:37 +0000)
printing: Unref old spool_io before setting new one

Closes #4627

See merge request GNOME/gtk!4370


Trivial merge