Core/Spells: Fix an infinite loop caused by a mix of item 25498 and liquid damage (ported commit: 9b292f436903e436bfdfdc61d40d2efffad35bca)

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

@@ -3308,14 +3308,16 @@ void Unit::ProcessTerrainStatusUpdate(ZLiquidStatus status, Optional<LiquidData>
         if (_lastLiquid && _lastLiquid->SpellId)
             RemoveAurasDueToSpell(_lastLiquid->SpellId);
         Player* player = GetCharmerOrOwnerPlayerOrPlayerItself();
+
+        // Set _lastLiquid before casting liquid spell to avoid infinite loops
+        _lastLiquid = curLiquid;
+
         if (curLiquid && curLiquid->SpellId && (!player || !player->IsGameMaster()))
             CastSpell(this, curLiquid->SpellId, true);
 
         // Update mount capabilities when changing liquidstatus (enabling / disabling flight auras for example)
         if (player)
             player->UpdateMountCapabilities();
-
-        _lastLiquid = curLiquid;
     }
 }
 void Unit::DeMorph()