fix unk1 calculations

[ScanMountGoat]

• fighter/dedede/model/body/c00/lod.xmb
• fighter/mario/model/fireball/c00/model.xmb
• fighter/pikachu/model/dengeki/c00/model.xmb
• fighter/pikachu/model/dengekidama/c00/model.xmb
• fighter/pikachu/model/kaminari/c00/model.xmb
• miihat/doseisan/model/body/c00/lod.xmb
• miihat/kingkrool/model/body/c00/lod.xmb
• miihat/labo/model/body/c00/lod.xmb
• miihat/lady/model/body/c00/lod.xmb
• miihat/link/model/body/c00/lod.xmb
• miihat/lip/model/body/c00/lod.xmb
• miihat/nature/model/body/c00/lod.xmb
• miihat/ribbongirl_f/model/body/c00/lod.xmb
• miihat/specialforces/model/body/c00/lod.xmb
• miihat/splatoon/model/body/c00/lod.xmb
• miihat/splatoon2_f/model/body/c00/lod.xmb
• miihat/splatoonhair_m/model/body/c00/lod.xmb

There is a missing -1 value that isn't generated by the current implementation.
fighter/dedede/model/body/c01/lod.xmb

The current implementation doesn't correctly handle the case where a leaf node has a sibling with children.
fighter/mario/model/fireball/c00/model.xmb