Overuse of std::transform

Using std::transform on a simple, NULL-terminated string. This is a horrible perversion of what was simple -- if unattractive -- code:

template <typename t=""> T* ToLower (T* psz)
{
   if (!psz)
       return 0;

   size_t size;

   if (sizeof(T) == 1)
       size = strlen((char *)psz);
   else
       size = wcslen((wchar_t *)psz);

   std::transform(psz, psz + size, psz, tolower);

   return psz;
}