Core/Spells: Fix damage done by SPELL_EFFECT_NORMALIZED_WEAPON_DMG

Fix a rare case that would cause SPELL_EFFECT_NORMALIZED_WEAPON_DMG to do 4 billions damage or to trigger an assertion in Unit::CalculateDamage() depending by Unit base damage.
To reproduce the issue cast spell 25816 on a level 1-14 warrior, then make the warrior cast spell 694 on a Creature.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index 71c19674790..aaa9328ea89 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -2206,6 +2206,9 @@ uint32 Unit::CalculateDamage(WeaponAttackType attType, bool normalized, bool add
         }
     }
 
+    minDamage = std::max(0.f, minDamage);
+    maxDamage = std::max(0.f, maxDamage);
+
     if (minDamage > maxDamage)
         std::swap(minDamage, maxDamage);