Description of the problem, including code/CLI snippet

Currently if you try to get a list with alot of results, eg. the main GitLab project's issues list

gl=gitlab.Gitlab('https://gitlab.com',private_token='XXXXXXX')gl.auth()gitlab_prj=gl.projects.get(278964,lazy=True)issues=gitlab_prj.issues.list(order_by='updated_at',sort='asc',per_page=100,as_list=False)

You'll get an error when you try and use the list:

Exception has occurred: TypeErrorint() argument must be a string, a bytes-like object or a number, not 'NoneType'

Due to the fact that, for performance reasons GitLab don't return certain headers when the responses exceed 10,000:https://docs.gitlab.com/ee/user/gitlab_com/index.html#pagination-response-headers

Expected Behavior

Gracefully handle this lack ofx-total andx-total-pages header, either by limiting the results to 10,000 responses, or allowing a user to manually set the_list._total and_list._total_pages values.

Actual Behavior

Crashes with the above exception.

Specifications

• python-gitlab version:2.7.1
• API version you are using (v3/v4):v4
• Gitlab server version (or gitlab.com):gitlab.com