[RM-8166] Check that the modifications made to check integration window size are functional with m_optMethod != 0

Created on 2023-07-05 09:00:36 by Fanny Dufresne. % Done: 0

In ticket 7529, we added a check on integration window size (integration range contained in window range).
We did not check how the code behaves with m_optMethod != 0 (see pdfcandidatesz.cpp file). This corresponds to the gaussian fit case.

Linked to https://projets.lam.fr/issues/7529