bug : progressive jpeg

[abarre]

If image-recompress fails to find a better quality for a given image, the resulting image is not encoded in progressive mode even if the option has been set.

The expected behavior is to get a progressive image as a result with the same quality.

[andrews05]

+1, most jpegs are still able to be optimized by mozjpeg even if they don't actually get recompressed. This would save me having to run images through jpegtran if jpeg-recompress doesn't act on them. Perhaps this could be dependant on the --no-copy switch: If copying the file, optimize it, else if no-copy is set then still skip it.