fix(Core/Creature): Kill credit, loot and XP lost on creatures spawning below half health. (#26862)

src/server/game/Entities/Creature/Creature.cpp

@@ -1771,6 +1771,9 @@ bool Creature::LoadCreatureFromDB(ObjectGuid::LowType spawnId, Map* map, bool ad
 
     SetHealth(m_deathState == DeathState::Alive ? curhealth : 0);
 
+    // SelectLevel() sized the player damage requirement against full health, before curhealth was known
+    ResetPlayerDamageReq();
+
     // checked at creature_template loading
     m_defaultMovementType = MovementGeneratorType(data->movementType);