Fix memory corruption in Ogre2GpuRays (Garden)

[darksylinc]

🦟 Bug fix

No ticket was filed for this bug.

Summary

Same as PR #787

Garden flavour.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #788 (0b05a60) into gz-rendering7 (918c1f1) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@                Coverage Diff                @@
##           gz-rendering7     #788      +/-   ##
=================================================
- Coverage          76.12%   76.12%   -0.01%     
=================================================
  Files                164      164              
  Lines              14392    14390       -2     
=================================================
- Hits               10956    10954       -2     
  Misses              3436     3436              

Impacted Files	Coverage Δ
ogre2/src/Ogre2GpuRays.cc	91.42% <100.00%> (-0.03%)	⬇️

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