Corrupted RGBA Channels when decoding images.

[ajmwagar]

When I try and decode an encoded image from another file something weird happens.

Some of the color channels get swapped.

For example, if I encode bee.png into apple-test.png and save as output.png
I get the following image:

If I decode the resulting image with stego decode image -i output.png, I get the following corrupted image:

Seems like the Blue and Green color channels are being swapped.

Running the decoding loop in reverse doesn't fix the problem.