fix condition (picture->colorspace == WEBP_YUV420A)
@ -19,7 +19,7 @@ static int webpEncodeYUVA(const WebPConfig *config, WebPPicture *picture, uint8_
picture->y = y;
picture->u = u;
picture->v = v;
if (picture->colorspace = WEBP_YUV420A) {
if (picture->colorspace == WEBP_YUV420A) {
picture->a = a;
}
picture->writer = (WebPWriterFunction)writeWebP;