Commit 50776a76 authored by Sébastien Villemot's avatar Sébastien Villemot

Remove the unsignedness of many integer variables and function arguments

This was only adding unneeded complexity, for no clear reason (we’re very far
from reaching 2³¹ equations, and if we wanted to support models that large, it
would be better to use long integers to avoid being limited to 2³²).
parent 92c3cbdf
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