'HumanRendering' object has no attribute 'window' (#1078)

[RogerJL]

Description

Place initialization before asserts to avoid exit/close code to access uninitialized instance variables.

Fixes # (1078)

Type of change

Please delete options that are not relevant.

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

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works

[RedTachyon]

Can you add tests showing the bug, that would fail on current main branch, and pass with this fix?

[RogerJL]

The bug is automatically ignored. But if you look in the logs you get very confused...
Take this as an example - main (3.12 shown)

https://github.com/Farama-Foundation/Gymnasium/actions/runs/9422643271/job/25959372466

tests/wrappers/vector/test_human_rendering.py::test_render_modes
  /usr/local/lib/python3.12/site-packages/_pytest/unraisableexception.py:78: PytestUnraisableExceptionWarning: Exception ignored in: <function VectorEnv.__del__ at 0x7f7f7083f9c0>
  
  Traceback (most recent call last):
    File "/usr/local/gymnasium/gymnasium/vector/vector_env.py", line 324, in __del__
      self.close()
    File "/usr/local/gymnasium/gymnasium/wrappers/vector/rendering.py", line 178, in close
      if self.window is not None:
         ^^^^^^^^^^^
  AttributeError: 'HumanRendering' object has no attribute 'window'
  
    warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))

[pseudo-rnd-thoughts]

Thanks for the PR