fix: error on InitializeIfNeeded

close #264

Scripts/UIParticle.cs

@@ -480,6 +480,7 @@ namespace Coffee.UIExtensions
 
         private void InitializeIfNeeded()
         {
+            if (!this) return;
             if (enabled && m_IsTrail)
             {
                 UnityEngine.Debug.LogWarningFormat(this, "[UIParticle] The UIParticle component should be removed: {0}\nReason: UIParticle for trails is no longer needed.", name);