MAG: Incorrectly decoding colors with the embedded palette on MSX2/SCR8

On the MSX2 the screen8 mode has a hardcoded palette of 256 colors. This means that, when it loads the contents of a Makichan v2 file, the palette embedded in the MAG file will be ignored and only the direct indices will be used.

Currently, RECOIL always decodes the file using the embedded palette. But this can result in mistakes when RECOIL is used to check if a MAG file was created correctly, and it will only be detected later when running on the real hardware.

The problem is that creating MAG files requires the use of archaich MS-DOS utilities in Japanese language, so it very error-prone. So it would be good to be able to rely on RECOIL to detect color errors as soon as possible, without having to boot the MSX.

I attached here two images that have such color encoding errors, and PNG images that show how the real MSX renders them.