Ctrl-C with -gthread on Windows, causes uncaught IOError

[Fernando Perez]

The proposed fix is, in Shell.py
      try:
          update_tk(self.tk)
          self.IP.runcode()
          time.sleep(0.01)
          return True
      except IOError:
          return True

See for details:
http://mail.scipy.org/pipermail/ipython-dev/2009-August/005407.html

Note that with the new inputhook work, this may become completely unnecessary. But still, if we ever put out an 0.10.1 bugfix release on the 0.10 series, this fix should go in.