Resolve "zs computation method return -1 when error occur, whereas "-1" is a valid zs value"
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requested to merge 66-zs-computation-method-return-1-when-error-occur-whereas-1-is-a-valid-zs-value into release-1.6
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- Aurore Dupuis authored
Merge branch '66-zs-computation-method-return-1-when-error-occur-whereas-1-is-a-valid-zs-value' of https://gitlab.orfeo-toolbox.org/remote_modules/let-it-snow into 66-zs-computation-method-return-1-when-error-occur-whereas-1-is-a-valid-zs-value
