[AGIPD][CORRECT] Enabling correction for part of the modules of AGIPD1M installation

Description

This MR fixes an error when correction is attempted with less modules than the nominal modules number of the AGIPD instance.

How Has This Been Tested?

Tested through command line on SPB data

Relevant Documents (optional)

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

Reviewers

@ahmedk @schmidtp @jsztuk