ipython/ipython — pull request #1573 by pankajp (2012-04-12 13:11:13+00:00)
Title: BUG: Ctrl+C crashes wx pylab kernel in qtconsole.

Wx import sets the SIGINT handler to 0 so we reset it to python's
default_int_handler to handle Ctrl+C.
The following thread discusses the issue:
http://mail.scipy.org/pipermail/ipython-dev/2012-April/008942.html