Fix the build with cups < 2.2.12 (!2744) · Merge requests · GNOME / gtk

The source project of this merge request has been removed.

Thomas Lange requested to merge (removed):master into master Oct 26, 2020

PPD_CUSTOM_UNKNOWN was introduced in cups 2.3. and has been backported to 2.2.12. Only handle it when we build against a new enough cups.

Fix the build with cups < 2.2.12