fontchooser: Only compare font descriptions when families match
fontchooser: Only compare font descriptions when families match

This way, we can find fonts way quicker as we only need to create font
descriptions for fonts with matching families. Most importantly, we're
rather quick in the "the font doesn't exist" case.

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