ZeroDivisionError with self._induced_amplitude=0

[FilipDem]

I integrated the autotuning algorithm in my virtual thermostat for electric house heating.
It seems to work fine, however from time to time, I got a "ZeroDivisionError" in line

pid-autotune/autotune.py

Lines 200 to 201 in 60505e9

	amplitude_dev = ((0.5 * (abs_max - abs_min) - self._induced_amplitude)
	/ self._induced_amplitude)

.

This means that self._induced_amplitude is zero. How to deal with this? Simply skip the run by adding a test in

pid-autotune/autotune.py

Line 189 in 60505e9

if inflection and (self._peak_count > 4):

?

Thanks for comment!