Issue 1103 - Migrate Simple Adblock users

src/plugin/PluginUserSettings.cpp

 /*
  * 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 434 matching lines @@
       break;
     case dispatchID_GetConversion:
       {
         if (pDispparams->cArgs != 0)
         {
           return DISP_E_BADPARAMCOUNT;
         }
         if (pVarResult)
         {
           pVarResult->vt = VT_BSTR;
-          pVarResult->bstrVal = CComBSTR(CPluginClient::GetInstance()->GetPref(std::wstring(L"convertedFrom"), std::wstring(L"")).c_str());
+          pVarResult->bstrVal = CComBSTR(CPluginClient::GetInstance()->GetPref(L"convertedFrom", L"").c_str());
         }
       }
       break;
     default:
       return DISP_E_MEMBERNOTFOUND;
       break;
     }
   }
   catch (...)
   {
     return E_FAIL;
   }
   return S_OK;
 }