Refine toRenderSVGResourceContainer()

Source/core/svg/SVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Alp Toker <alp@atoker.com>
  * Copyright (C) 2009 Cameron McCormack <cam@mcc.id.au>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 963 matching lines @@
     if (attrName == HTMLNames::classAttr) {
         classAttributeChanged(classNameCurrentValue());
         SVGElementInstance::invalidateAllInstancesOfElement(this);
         return;
     }
 
     if (isIdAttributeName(attrName)) {
         RenderObject* object = renderer();
         // Notify resources about id changes, this is important as we cache resources by id in SVGDocumentExtensions
         if (object && object->isSVGResourceContainer())
-            object->toRenderSVGResourceContainer()->idChanged();
+            toRenderSVGResourceContainer(object)->idChanged();
         if (inDocument())
             buildPendingResourcesIfNeeded();
         SVGElementInstance::invalidateAllInstancesOfElement(this);
         return;
     }
 }
 
 void SVGElement::synchronizeAnimatedSVGAttribute(const QualifiedName& name) const
 {
     if (!elementData() || !elementData()->m_animatedSVGAttributesAreDirty)
@@ skipping 183 matching lines @@
     }
 
     if (name == classAttr)
         return true;
 
     return animatableAttributes.contains(name);
 }
 #endif
 
 }