Creating a new wxString from c_str() of the old one resulted in dropping all string data after the first embedded NUL. Fix this by using Clone() method that exists specifically for this purpose. It also makes the code more clear. Closes #14380. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71701 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775