fix: clang-warnings

[vikhik]

Pull Request Template

Description

Fix warnings compiling with clang-21 on windows

Depends upon https://github.com/vsg-dev/VulkanSceneGraph/pull/1625 - marked Draft until that one is merged.

Fixes # (issue)

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• cmake -B build . -G "Ninja Multi-Config"
• cmake --build build -C Release

Test Configuration:

• Windows 10
• cmake version 3.31.6
• ninja version 1.21.1
• clang version 21.1.7
• Visual Studio 2022 installed for msvcrt