fix(Core/Spells): No SP bonus for DmgClass NONE without spell_bonus_data (#25468)

Co-authored-by: blinkysc <blinkysc@users.noreply.github.com>
Co-authored-by: ariel- <ariel-@users.noreply.github.com>
Co-authored-by: Shauren <shauren.trinity@gmail.com>

src/server/game/Entities/Unit/Unit.cpp

@@ -8870,6 +8870,12 @@ uint32 Unit::SpellDamageBonusDone(Unit* victim, SpellInfo const* spellProto, uin
             }
         }
     }
+    else
+    {
+        // No bonus damage for SPELL_DAMAGE_CLASS_NONE class spells by default
+        if (spellProto->DmgClass == SPELL_DAMAGE_CLASS_NONE)
+            return uint32(std::max((float(pdamage) + DoneTotal) * DoneTotalMod, 0.0f));
+    }
 
     // Default calculation
     if (coeff && DoneAdvertisedBenefit)