don't log an error if the directory can't be opened at all for compatibility with MSW (#10194)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@56867 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/unix/dir.cpp

@@ -225,9 +225,6 @@ bool wxDir::Open(const wxString& dirname)
 
     if ( !M_DIR->IsOk() )
     {
-        wxLogSysError(_("Can not enumerate files in directory '%s'"),
-                      dirname.c_str());
-
         delete M_DIR;
         m_data = NULL;