Fix error in air webkit cause by overload imageSmoothingEnabled
Fix error in air webkit cause by overload imageSmoothingEnabled

Lanfei/egret-core,Lanfei/egret-core,jiangzhonghui/egret-core,SmallAiTT/egret-core,SmallAiTT/egret-core,jiangzhonghui/egret-core