Fixed issue where non-scrolling continuous text wasn't centred properly.
Fixed issue where non-scrolling continuous text wasn't centred properly.

The fadeLength wasn't being properly taken into account when
calculating the label frame, causing the text to be slightly off-centre.

yunzhongyoulong/MarqueeLabel,litt1e-p/MarqueeLabel,ihello/MarqueeLabel,Anish-kumar-dev/MarqueeLabel,suchitabohra/MarqueeLabel,amitmalhotra/MarqueeLabel,cbpowell/MarqueeLabel,ByunghooLim/MarqueeLabel,cbpowell/MarqueeLabel,zmcadam/MarqueeLabel,RacZo/MarqueeLabel,KBvsMJ/MarqueeLabel