Bugfix for loopCount (#2155)
Bugfix for loopCount (#2155)

If a GIF image has no Netscape 2.0 loop extension, it is meant to play once and then stop

awkward/SDWebImage,tualatrix/SDWebImage,dreampiggy/SDWebImage,iheartradio/SDWebImage,dreampiggy/SDWebImage,smule/SDWebImage,awkward/SDWebImage,Insfgg99x/SDWebImage,rs/SDWebImage,awkward/SDWebImage,zhang-yawei/SDWebImage,dreampiggy/SDWebImage