[SciPy-Dev] Bug fix pull-request for signal.bode()

[Bjørn Forsman]

Hi,

I discovered a bug in signal.bode() that makes it unable to handle a
systems with a zero-pole. signal.bode(([], [0], 1)) will provoke it.
Please pull

https://github.com/scipy/scipy/pull/253

to fix this bug.

Best regards,
Bjørn Forsman