[AGIPD] [Correct] error out only if all sources are empty
Description
This MR is related to https://redmine.xfel.eu/issues/150179#change-549590
The fix is to avoid erroring out the notebook when some and not all sources are empty in the run.
How Has This Been Tested?
This has been tested with the runs mentioned in the ticket.
Relevant Documents (optional)
Types of changes
- Bug fix (non-breaking change which fixes an issue)
Checklist:
Reviewers
Edited by Thomas Kluyver