cups: Add hack to work around gcc warning
cups: Add hack to work around gcc warning

gcc warns if you switch on values that are not part of the enum you're
switching on. So handle those cases in the default handler by using if
statments.

PS: Someone file a bug against cups about this?

davidt/gtk,simokivimaki/gtk,davidt/gtk,jessevdk/gtk,jessevdk/gtk,bratsche/gtk-,Lyude/gtk-,grubersjoe/adwaita,chergert/gtk,davidgumberg/gtk,Lyude/gtk-,ahodesuka/gtk,jessevdk/gtk,Adamovskiy/gtk,simokivimaki/gtk,alexlarsson/gtk,grubersjoe/adwaita,grubersjoe/adwaita,msteinert/gtk,jadahl/gtk,ahodesuka/gtk,Adamovskiy/gtk,davidgumberg/gtk,davidgumberg/gtk,msteinert/gtk,Distrotech/gtk2,Sidnioulz/SandboxGtk,bratsche/gtk-,Sidnioulz/SandboxGtk,msteinert/gtk,jigpu/gtk,bratsche/gtk-,davidgumberg/gtk,Lyude/gtk-,grubersjoe/adwaita,alexlarsson/gtk,Sidnioulz/SandboxGtk,chergert/gtk,chergert/gtk,simokivimaki/gtk,chergert/gtk,msteinert/gtk,jigpu/gtk,Adamovskiy/gtk,ebassi/gtk,alexlarsson/gtk,Sidnioulz/SandboxGtk,jigpu/gtk,jadahl/gtk,jadahl/gtk,bratsche/gtk-,ahodesuka/gtk,Distrotech/gtk2,Adamovskiy/gtk,simokivimaki/gtk,grubersjoe/adwaita,jigpu/gtk,jessevdk/gtk,chergert/gtk,bratsche/gtk-,jadahl/gtk,simokivimaki/gtk,ahodesuka/gtk,msteinert/gtk,alexlarsson/gtk,davidt/gtk,ebassi/gtk,Sidnioulz/SandboxGtk,ahodesuka/gtk,grubersjoe/adwaita,alexlarsson/gtk,davidgumberg/gtk,davidgumberg/gtk,Distrotech/gtk2,Adamovskiy/gtk,jigpu/gtk,jigpu/gtk,ahodesuka/gtk,chergert/gtk,davidgumberg/gtk,Adamovskiy/gtk,Lyude/gtk-,jadahl/gtk,alexlarsson/gtk,ebassi/gtk,jigpu/gtk,Sidnioulz/SandboxGtk,alexlarsson/gtk,ebassi/gtk,jessevdk/gtk,alexlarsson/gtk,Adamovskiy/gtk,chergert/gtk,davidt/gtk,jadahl/gtk,Distrotech/gtk2,davidt/gtk,jadahl/gtk,davidgumberg/gtk,Adamovskiy/gtk,ebassi/gtk,jadahl/gtk,Lyude/gtk-,jessevdk/gtk,davidt/gtk,Lyude/gtk-,chergert/gtk,msteinert/gtk,jigpu/gtk,Distrotech/gtk2,Distrotech/gtk2,grubersjoe/adwaita,jessevdk/gtk,bratsche/gtk-,ebassi/gtk,ahodesuka/gtk,simokivimaki/gtk,ahodesuka/gtk,Lyude/gtk-,grubersjoe/adwaita,Lyude/gtk-