Don't rely on implicit conversion of wxString to char*/wxChar*, it doesn't exist in STL build. Add explicit c_str(), wc_str() or t_str() calls. Closes #14420. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71820 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775