Issue #276 - introduce class BSTR_Argument

src/plugin/PluginFilter.cpp

 #include "PluginStdAfx.h"
 
 #include "PluginFilter.h"
 
 #include "COM_Value.h"
 #if (defined PRODUCT_ADBLOCKPLUS)
 #include "PluginSettings.h"
 #include "PluginClient.h"
 #include "PluginClientFactory.h"
 #endif
@@ skipping 317 matching lines @@
         value = to_CString(id);
         if (!value.IsEmpty())
         {
           attrFound = true;
         }
       }
     }
     else 
     {
       CComVariant vAttr;
-      CString attr = attrIt->m_attr;  // temporary required because to_wstring conversion cannot be const.
-      AdblockPlus::COM::BSTR_Argument attribute_name(to_wstring(attr));
+      AdblockPlus::COM::BSTR_Argument attribute_name(to_wstring(attrIt->m_attr));
       if (SUCCEEDED(pEl->getAttribute(attribute_name, 0, &vAttr)))
       {
         attrFound = true;
         if (vAttr.vt == VT_BSTR)
         {
           value = vAttr.bstrVal;
         }
         else if (vAttr.vt == VT_I4)
         {
           value.Format(L"%u", vAttr.iVal);
@@ skipping 371 matching lines @@
       DEBUG_FILTER("Filter::ShouldBlock " + type + " YES")
 
 #ifdef ENABLE_DEBUG_RESULT
         CPluginDebug::DebugResultBlocking(type, src, domain);
 #endif
     }
     return true;
   }
   return false;
 }