fix message box when trying to open a non-existant function in the editor * main-window.cc (handle_edit_mfile_request): move message box from the interpreter thread into a gui slot and just emit the related new signal; (warning_function_not_found): new slot showing the message box (construct): connect new signal to new slot * main-window.h: new signal warning_function_not_found_signal and new slot warning_function_not_found

((nil .
      ((c-file-style . "gnu")
       (indent-tabs-mode . nil)
       (fill-column . 72)))
 (change-log-mode . ((indent-tabs-mode . t)))
 (makefile-mode . ((indent-tabs-mode . t))))