Fixed expressions in gtk_button_size_allocate()
Fixed expressions in gtk_button_size_allocate()

Children were getting negative allocations by misusage
of MAX() macro (bad signedness of expressions).

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