Issue #1234 + Clean up - CPluginTab (dead code, nullptr defect fix, etc.)

src/plugin/PluginDomTraverserBase.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 110 matching lines @@
 template <class T>
 bool CPluginDomTraverserBase<T>::IsEnabled()
 {
   return CPluginSettings::GetInstance()->IsPluginEnabled();
 }
 
 
 template <class T>
 void CPluginDomTraverserBase<T>::TraverseDocument(IWebBrowser2* pBrowser, bool isMainDoc, const std::wstring& indent)
 {
-  DWORD res = WaitForSingleObject(m_tab->m_filter->hideFiltersLoadedEvent, ENGINE_STARTUP_TIMEOUT);
+  DWORD res = WaitForSingleObject(m_tab->m_filter.hideFiltersLoadedEvent, ENGINE_STARTUP_TIMEOUT);
   if (!IsEnabled()) return;
 
   VARIANT_BOOL isBusy;
   if (SUCCEEDED(pBrowser->get_Busy(&isBusy)))
   {
     if (isBusy != VARIANT_FALSE)
     {
       return;
     }
   }
@@ skipping 312 matching lines @@
   {
     m_cacheIndexLast = 0;
     m_cacheDocumentHasFrames.clear();
     m_cacheDocumentHasIframes.clear();
   }
   m_criticalSection.Unlock();
 }
 
 
 #endif // _PLUGIN_DOM_TRAVERSER_BASE_H_