Fix up save nomenclature

[luckytyphlosion]

It makes no sense. There are four structs: SaveArrayHeader, SaveArrayFooter, SaveChunkHeader, SaveChunkFooter. SaveChunkHeader isn't even defined in the same place as SaveChunkFooter.

static void CreateChunkFooter(SaveData *saveData, void *data, int idx, u32 size) {
    struct SaveArrayFooter *footer;

    footer = (struct SaveArrayFooter *)((u8 *)data + size);

    footer->magic = SAVE_CHUNK_MAGIC;
    footer->saveno = saveData->lastGoodSaveNo + 1;
    footer->size = size;
    footer->idx = idx;
    footer->crc = GF_CalcCRC16(data, size + offsetof(struct SaveArrayFooter, crc));
}

The function is named CreateChunkFooter yet it doesn't even use SaveChunkFooter.

Probably a bunch of other stuff, I could spend 15 minutes and find more inconsistencies but I don't think it's necessary to point out more stuff.

[red031000]

makes sense to me 🥺