Merge pull request #4 from SDWebImage/bugfix_CMYK

Fix the encoding compatibility for CMYK image

Author: dreampiggy

SDWebImageFLIFCoder/Classes/SDImageFLIFCoder.m

@@ -374,7 +374,8 @@ - (FLIF_IMAGE *)sd_encodedFLIFFrameWithImage:(nonnull UIImage *)image {
         .bitsPerComponent = (uint32_t)CGImageGetBitsPerComponent(imageRef),
         .bitsPerPixel = (uint32_t)CGImageGetBitsPerPixel(imageRef),
         .colorSpace = CGImageGetColorSpace(imageRef),
-        .bitmapInfo = bitmapInfo
+        .bitmapInfo = bitmapInfo,
+        .renderingIntent = CGImageGetRenderingIntent(imageRef)
     };
     vImage_CGImageFormat destFormat = {
         .bitsPerComponent = 8,