fix(network_info): oob read due to integer truncation

[bboilot-ledger]

Description

Fixes https://ledgerhq.atlassian.net/browse/DONJON-1012

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)
• Tests
• Documentation
• Other (for changes that might not fit in any category)

Breaking changes

Please complete this section if any breaking changes have been made, otherwise delete it.

Additional comments

Please post additional comments in this section if you have them, otherwise delete it.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.02%. Comparing base (0737588) to head (a525e4c).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #970   +/-   ##
========================================
  Coverage    55.02%   55.02%           
========================================
  Files           16       16           
  Lines         1592     1592           
  Branches       201      201           
========================================
  Hits           876      876           
  Misses         712      712           
  Partials         4        4           

Flag	Coverage Δ
unittests	55.02% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.