Check AddBvhAnimation return value

[nkoenig]

Signed-off-by: Nate Koenig [email protected]

🦟 Bug fix

Redo of #1632, targeting Fortress.

Summary

Check the return value of the AddBvhAnimation function call.

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 #1750 (5d69ad3) into ign-gazebo6 (216d5a5) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@               Coverage Diff               @@
##           ign-gazebo6    #1750      +/-   ##
===============================================
- Coverage        64.60%   64.59%   -0.01%     
===============================================
  Files              321      321              
  Lines            26297    26300       +3     
===============================================
  Hits             16989    16989              
- Misses            9308     9311       +3     

Impacted Files	Coverage Δ
src/rendering/SceneManager.cc	28.38% <0.00%> (-0.08%)	⬇️

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