Issue #3562 - Use 'ToWstring()' to convert BSTR values

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 166 matching lines @@
         if (pDispparams->rgvarg[0].vt != VT_BSTR || pDispparams->rgvarg[1].vt != VT_BSTR)
         {
           return DISP_E_TYPEMISMATCH;
         }
         if (pVarResult)
         {
           CComBSTR key = pDispparams->rgvarg[0].bstrVal;
           CComBSTR section = pDispparams->rgvarg[1].bstrVal;
           Dictionary* dictionary = Dictionary::GetInstance();
           std::wstring message = dictionary->Lookup(
-            ToUtf8String(std::wstring(section, ::SysStringLen(section))),
-            ToUtf8String(std::wstring(key, ::SysStringLen(key)))
+            ToUtf8String(ToWstring(section)),
+            ToUtf8String(ToWstring(key))
           );
 
           pVarResult->vt = VT_BSTR;
           pVarResult->bstrVal = SysAllocString(message.c_str());
         }
       }
       break;
     case dispatchID_GetLanguageCount:
       {
         if (pDispparams->cArgs != 0)
@@ skipping 245 matching lines @@
       return DISP_E_MEMBERNOTFOUND;
       break;
     }
   }
   catch (...)
   {
     return E_FAIL;
   }
   return S_OK;
 }