More verbose error handling for this exception:

More verbose error handling for this exception:
Traceback (most recent call last):
 File "./iotop.py", line 11, in <module>
   main()
 File "/src/iotop/iotop/iotop/ui.py", line 249, in main
   curses.wrapper(run_iotop, options)
 File "/usr/lib64/python2.5/curses/wrapper.py", line 44, in wrapper
   return func(stdscr, *args, **kwds)
 File "/src/iotop/iotop/iotop/ui.py", line 205, in run_iotop
   ui.run()
 File "/src/iotop/iotop/iotop/ui.py", line 95, in run
   self.process_list.duration)
 File "/src/iotop/iotop/iotop/ui.py", line 198, in refresh_display
   self.win.addstr(i + 2, 0, lines[i].encode('utf-8'))
_curses.error: addstr() returned ERR