Use ContainerNode::hasChildren() instead of firstChild() in conditionals

Source/core/svg/SVGTitleElement.cpp

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 21 matching lines @@
     ScriptWrappable::init(this);
 }
 
 DEFINE_NODE_FACTORY(SVGTitleElement)
 
 Node::InsertionNotificationRequest SVGTitleElement::insertedInto(ContainerNode* rootParent)
 {
     SVGElement::insertedInto(rootParent);
     if (!rootParent->inDocument())
         return InsertionDone;
-    if (firstChild() && document().isSVGDocument())
+    if (hasChildren() && document().isSVGDocument())
         document().setTitleElement(this);
     return InsertionDone;
 }
 
 void SVGTitleElement::removedFrom(ContainerNode* rootParent)
 {
     SVGElement::removedFrom(rootParent);
     if (rootParent->inDocument() && document().isSVGDocument())
         document().removeTitle(this);
 }
 
 void SVGTitleElement::childrenChanged(const ChildrenChange& change)
 {
     SVGElement::childrenChanged(change);
     if (inDocument() && document().isSVGDocument())
         document().setTitleElement(this);
 }
 
 }