fix(client): guard against AttributeError in AsyncHttpxClientWrapper.…

[raulblazquezbullon]

• I understand that this repository is auto-generated and my pull request may not be merged

Changes being requested

Move the is_closed guard inside the try/except block in AsyncHttpxClientWrapper.__del__.

If the object was partially initialized (an exception was raised inside httpx.BaseClient.__init__ before self._state was assigned), the garbage collector triggers __del__ on an object that has no _state attribute. The is_closed property accesses _state, so it raises AttributeError, which propagates as an unsilenced "Exception ignored" warning.

Observed traceback:

Exception ignored in: <function AsyncHttpxClientWrapper.del at 0x106384ae0>
Traceback (most recent call last):
File ".../openai/_base_client.py", line 1430, in __del__
    if self.is_closed:
    ^^^^^^^^^^^^^^
File ".../httpx/_client.py", line 202, in is_closed
    return self._state == ClientState.CLOSED
    ^^^^^^^^^^^
AttributeError: 'AsyncHttpxClientWrapper' object has no attribute '_state'

The fix moves the check inside the existing try/except Exception, consistent with the method's original intent to silence all finalization errors. No functional behaviour changes for fully initialized objects.

Additional context & links

• httpx.BaseClient.__init__ assigns _state as its last statement, any earlier failure (e.g. invalid base_url, bad headers) leaves _state unset.
• The fix is purely defensive and introduces no new public API surface.