GtkSpinButton: Only notify 'adjustment' if the property changed
GtkSpinButton: Only notify 'adjustment' if the property changed

https://bugzilla.gnome.org/show_bug.cgi?id=734649

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