Fix memory access error on 5x5 sensors

[leoyala]

Description

Fixes memory access error when mosaic share is not divisible by raw image dimensions.

Related Issue

#24

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Checklist

• I've read the CODE_OF_CONDUCT.md document.
• I've updated the code style using the pre-commit hooks.
• I've written tests for all new methods and classes that I created.
• I've written the docstring for all the methods and classes that I used.