Avoid divide by 0 in Pulse modeling

[Apicazo9]

Relevant Issue(s)/PR(s)

Avoid divide by 0

Provide an overview of the implemented solution or the fix and elaborate on the modifications.

stingray\stingray\pulse\modeling.py

Avoid divide by 0 by changing parameter to a very small number (1e-10)

Is there a new dependency introduced by your contribution? If so, please specify.

Any other comments?

[matteobachetti]

@Apicazo9 the number that comes out of that operation is already flagged a couple of lines below. Do you have any specific reason to avoid at all cost the division by zero?

[Apicazo9]

@matteobachetti I changed it because while changing values in the interactive phaseogram a warning showed up. I've been testing it now and it works fine, i don't understand what happened.