Speed up gtk_allocated_bit_mask_invert_range
Speed up gtk_allocated_bit_mask_invert_range

It was showing up on profiles and has a comment asking for speed.

grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,davidgumberg/gtk,davidgumberg/gtk,jigpu/gtk,davidgumberg/gtk,grubersjoe/adwaita,jadahl/gtk,davidgumberg/gtk,alexlarsson/gtk,jigpu/gtk,jigpu/gtk,davidgumberg/gtk,grubersjoe/adwaita,alexlarsson/gtk,davidgumberg/gtk,alexlarsson/gtk,alexlarsson/gtk,grubersjoe/adwaita,jadahl/gtk,jadahl/gtk,grubersjoe/adwaita,jadahl/gtk,jigpu/gtk,davidgumberg/gtk,alexlarsson/gtk,grubersjoe/adwaita,jadahl/gtk,jadahl/gtk,alexlarsson/gtk,alexlarsson/gtk,davidgumberg/gtk,jigpu/gtk,jadahl/gtk,jigpu/gtk,jigpu/gtk,alexlarsson/gtk,jigpu/gtk,jadahl/gtk