Corrected dealloc, added missing ivar
Corrected dealloc, added missing ivar

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