Fix Windows build, again

[chapulina]

Summary

Not sure why the Windows build was passing before without these fixes. In fact, I'm not sure why these aren't issues for other compilers 🤷‍♀️

In any case, this seems to fix it:

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• 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

[codecov]

Codecov Report

Merging #616 (4a0457f) into main (6166234) will decrease coverage by 0.03%.
The diff coverage is 90.47%.

@@            Coverage Diff             @@
##             main     #616      +/-   ##
==========================================
- Coverage   77.38%   77.34%   -0.04%     
==========================================
  Files         213      213              
  Lines       11950    11967      +17     
==========================================
+ Hits         9247     9256       +9     
- Misses       2703     2711       +8     

Impacted Files	Coverage Δ
include/ignition/gazebo/EntityComponentManager.hh	100.00% <ø> (ø)
include/ignition/gazebo/Server.hh	100.00% <ø> (ø)
include/ignition/gazebo/World.hh	100.00% <ø> (ø)
include/ignition/gazebo/components/Factory.hh	96.05% <ø> (ø)
...e/ignition/gazebo/detail/EntityComponentManager.hh	95.00% <ø> (ø)
include/ignition/gazebo/gui/GuiRunner.hh	100.00% <ø> (ø)
include/ignition/gazebo/gui/GuiSystem.hh	0.00% <ø> (ø)
include/ignition/gazebo/gui/TmpIface.hh	0.00% <ø> (ø)
src/Model.cc	95.58% <ø> (ø)
src/Server.cc	82.80% <ø> (ø)
... and 12 more

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