ArgumentOutOfRangeException Bugfix

[NiklasDerEchte]

MessageDeserializer.cs::Read(out string value) threw an error as soon as NaN values were present in the points of the mesh.
Zero values were therefore given and one was subtracted from them due to ROS2 conditions.
This resulted in negative becoming in a counting variable

Proposed change(s)

I kept the original programming and used a Math.Max() to ensure that the value does not exceed 0.

Types of change(s)

• Bug fix
• New feature
• Code refactor
• Documentation update
• Other (please describe)

Test Configuration:

• Unity Version: Unity 2021.3.32f1
• Unity machine OS + version: Windows 10
• ROS machine OS + version: Ubuntu 22.04, ROS2 Humble
• ROS–Unity communication: ROS2 TCP Node

Checklist

• Ensured this PR is up-to-date with the dev branch
• Created this PR to target the dev branch
• Followed the style guidelines as described in the Contribution Guidelines
• Added tests that prove my fix is effective or that my feature works
• Updated the Changelog and described changes in the Unreleased section
• Updated the documentation as appropriate

Other comments

[unity-cla-assistant]

All committers have signed the CLA.