Core/Auras: reworked multiplicative AuraEffects calculation

- Splitted containers for flat modifiers and pct modifiers, as they now have different handling
- Amount is now multiplied only on apply; on unapply, iterate through auras and reset the counter
- Fixes many cases of rounding error due to applying/unapplying of small factors
- Allows amounts to be zeroed (ie with an AuraEffect of amount -100)
- Do a partial revert of 6dc37a9add631888fe5fbcd43d19c2b07bed8a57, auras should update amounts only for items allowed (ie no more giving crit to a sword while having an axe in the other hand and being Poleaxe spec'd)
- SPELL_AURA_MOD_SCALE now scales additively, rather than multiplicatively (checked in sniffs)

Closes #18687

(cherry picked from commit c69a7d1223b2ce108a221e5cc70f76cd80ae6675)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/server/scripts/Spells/spell_pet.cpp b/src/server/scripts/Spells/spell_pet.cpp
index c0b570cbf46..7aaba87a2da 100644
--- a/src/server/scripts/Spells/spell_pet.cpp
+++ b/src/server/scripts/Spells/spell_pet.cpp
@@ -314,7 +314,7 @@ public:
                     {
                         if (AuraEffect* /* aurEff */ect = owner->GetAuraEffect(56246, EFFECT_0))
                         {
-                            float base_attPower = pet->GetModifierValue(UNIT_MOD_ATTACK_POWER, BASE_VALUE) * pet->GetModifierValue(UNIT_MOD_ATTACK_POWER, BASE_PCT);
+                            float base_attPower = pet->GetFlatModifierValue(UNIT_MOD_ATTACK_POWER, BASE_VALUE) * pet->GetPctModifierValue(UNIT_MOD_ATTACK_POWER, BASE_PCT);
                             amount += CalculatePct(amount+base_attPower, /* aurEff */ect->GetAmount());
                         }
                     }