Merge pull request #8 from SDWebImage/bugfix_CMYK

Fix the encoding compatibility for CMYK image

Author: dreampiggy

SDWebImageBPGCoder/Classes/SDImageBPGCoder.m

@@ -304,7 +304,8 @@ - (BPGImage *)sd_encodedBPGFrameWithImage:(nonnull UIImage *)image {
         .bitsPerComponent = (uint32_t)bitsPerComponent,
         .bitsPerPixel = (uint32_t)bitsPerPixel,
         .colorSpace = CGImageGetColorSpace(imageRef),
-        .bitmapInfo = bitmapInfo
+        .bitmapInfo = bitmapInfo,
+        .renderingIntent = CGImageGetRenderingIntent(imageRef)
     };
     vImage_CGImageFormat destFormat = {
         .bitsPerComponent = 16,