Change && to || for TDNFAlterRepoState for invalid argument check

[sameluch]

During development of virtual snapshot functionality, I noticed this as a bug in client/repolist.c. If pszId is NULL, but pRepos is not NULL, no 1602 error will be given to the user.

If this is intentional, this PR can be closed.

[vmwclabot]

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[oliverkurth]

Thanks you @sameluch! Can you please sign the license agreement? Then I can merge this.

You can also rebase to fix the workflow error.

[vmwclabot]

@sameluch, we have received your signed contributor license agreement. The review is usually completed within a week, but may take longer under certain circumstances. Another comment will be added to the pull request to notify you when the merge can proceed.