*** empty log message ***

Fltk/GUI.cpp

@@ -4285,6 +4285,7 @@ void GUI::create_message_window(bool redraw_only)
 
 void GUI::add_message(const char *msg)
 {
+  // remove \n, \t, \r
   std::string str(msg);
   for(unsigned int i = 0; i < str.size(); i++)
     if(str[i] == '\n' || str[i] == '\t' || str[i] == '\r') str[i] = ' ';