protect data for airship when no POI found with a idStore

[Llumbroso]

Pull Request Template

Types of changes

What types of changes does your code introduce to Woosmap Geofencing?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

Before you submit a pull request, please make sure you have to following:

• I've read contributing guidelines
• My code contain tests relevant for the problem I'm solving
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[Llumbroso]

#78