Always initialize CSSParserSelector::m_functionArgumentSelector.

Source/core/css/CSSParserValues.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * 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 129 matching lines @@
 }
 
 CSSParserSelector::CSSParserSelector()
     : m_selector(adoptPtr(new CSSSelector()))
     , m_functionArgumentSelector(0)
 {
 }
 
 CSSParserSelector::CSSParserSelector(const QualifiedName& tagQName)
     : m_selector(adoptPtr(new CSSSelector(tagQName)))
+    , m_functionArgumentSelector(0)
 {
 }
 
 CSSParserSelector::~CSSParserSelector()
 {
     if (!m_tagHistory)
         return;
     Vector<OwnPtr<CSSParserSelector>, 16> toDelete;
     OwnPtr<CSSParserSelector> selector = m_tagHistory.release();
     while (true) {
@@ skipping 66 matching lines @@
     CSSParserSelector* selector = const_cast<CSSParserSelector*>(this);
     do {
         if (selector->isDistributedPseudoElement())
             return selector;
     } while ((selector = selector->tagHistory()));
     return 0;
 }
 
 }