Fixed critical issue with package involving duplicate gates

[brennanfreeze]

Pull Request

Description

There was a critical error that was happening in the tests where the duplicate chain was checking the dummy entry and was trying to access NULL values, added a check to determine if the null id (which is set in the qlog_node) is 0. This is 100% going to get changed ASAP but is a good fix to continue other segments of the optimization code and will not affect anything else (hopefully).

Type of Change

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• Bugfix
• New feature
• Enhancement
• Documentation
• Refactoring
• Other (please specify):

Checklist

• I have read the contributing guidelines.
• I have added tests that prove my fix is effective or that my feature works.
• I have updated the documentation accordingly.
• I ran black formatter on the codebase. (CI/CD will fail if neglected)
• My code follows the project's coding style guidelines.

Related Issues

• Closes # (issue number)
• Related to qlog: optimize specific patterns #180

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Additional Notes

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