stylecontext: Return a ref in lookup_values_for_state
stylecontext: Return a ref in lookup_values_for_state

This will be necessary when we stop caching values for lookups with the
"wrong" state.

Lyude/gtk-,Lyude/gtk-,Lyude/gtk-,ahodesuka/gtk,alexlarsson/gtk,jadahl/gtk,chergert/gtk,davidgumberg/gtk,Adamovskiy/gtk,davidgumberg/gtk,grubersjoe/adwaita,Adamovskiy/gtk,alexlarsson/gtk,alexlarsson/gtk,Adamovskiy/gtk,Adamovskiy/gtk,alexlarsson/gtk,jadahl/gtk,ahodesuka/gtk,jadahl/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,grubersjoe/adwaita,Lyude/gtk-,davidgumberg/gtk,davidgumberg/gtk,chergert/gtk,chergert/gtk,davidgumberg/gtk,jadahl/gtk,grubersjoe/adwaita,ahodesuka/gtk,grubersjoe/adwaita,grubersjoe/adwaita,davidgumberg/gtk,Lyude/gtk-,grubersjoe/adwaita,jigpu/gtk,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,chergert/gtk,jadahl/gtk,davidgumberg/gtk,alexlarsson/gtk,Lyude/gtk-,jigpu/gtk,grubersjoe/adwaita,ahodesuka/gtk,Adamovskiy/gtk,ahodesuka/gtk,davidgumberg/gtk,Adamovskiy/gtk,chergert/gtk,ahodesuka/gtk,ahodesuka/gtk,jigpu/gtk,jadahl/gtk,chergert/gtk,jadahl/gtk,Lyude/gtk-,ahodesuka/gtk,chergert/gtk,jigpu/gtk,Lyude/gtk-,jigpu/gtk,Adamovskiy/gtk,chergert/gtk,alexlarsson/gtk,grubersjoe/adwaita