alignment: Remove unneeded checks
alignment: Remove unneeded checks

Size vfuncs always get non-null out variables passed, so no need to
check for NULL.

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