Move RestoreBattlerData out of Ai_CalcDmg and add SaveBattlerData Protections #4156
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Having this restore function implicit to AI_CalcDamage seems like poor coding practice. Also, AI_CalcDamage and AI_CalcDamageSaveBattlers were called within ai routines without saving or restoring the battlers afterwards, respectively, which could be problematic
Also adds a "saved" field to
struct AI_SavedBattleMon
to prevent calling SaveBattlerData twice on the same battler until the data is restored to prevent overwriting values