add init to convert twinbeeb bubble dump into something the driver can actually use (nw)

[ghost]

this is proof of the problem.. better would be to know why the dump was stripped in the first place...

[angelosa]

imho it must be marked as bad_dump

[ghost]

fwiw I've also added the CRC for the reencoded data, although obviously I don't know if it's 100% accurate.

I'll leave it up to somebody else to decide the best course of action with this (including any BAD_DUMP marking) either way the game works if the data being fed is actually in the expected format, either with the reencode function I've added, or just by loading the reencoded data.

I do worry with BAD_DUMP marking we end up with some political mess with people not liking their work being marked as BAD and refusing to dump anything else, even if something is better than nothing with cases like this, however I don't know if that is likely to be the case here as I don't know those involved.

[Osso13]

I propose to wait for an answer from the DU, then the best course of action can be decided

[ghost]

I think until there's a solution this can probably be merged tho? if a new dump surfaces, the extra init gets deleted and the correct format image loaded. this is no worse than leaving it non-working.

[Osso13]

I agree, even though IMHO there's no rush since it won't be in 0.221 anyway. I'll merge and then we can revisit once we have more info available.
BTW, thanks for looking at this!