Fixed [ 1712998 ] wxFD_FILE_MUST_EXIST does nothing on GTK

(broken both in GTK+ and generic code).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@45821 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/filedlgg.cpp

@@ -1471,6 +1471,7 @@ void wxGenericFileDialog::HandleAction( const wxString &fn )
     {
         wxMessageBox(_("Please choose an existing file."), _("Error"),
                      wxOK | wxICON_ERROR );
+        return;
     }
 
     SetPath( filename );