Fix diffColour coloring everything black
Fix diffColour coloring everything black

...along with another serious issue

LiquidPL/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,LiquidPL/osu-web,ppy/osu-web,nanaya/osu-web,nanaya/osu-web,LiquidPL/osu-web,LiquidPL/osu-web,nanaya/osu-web,nanaya/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,ppy/osu-web,ppy/osu-web,LiquidPL/osu-web,ppy/osu-web,notbakaneko/osu-web,ppy/osu-web,nanaya/osu-web