Fix "nested_control_flow" issue in zmaster.py #57
Description
Avoid deeply nested control flow statements.
https://codeclimate.com/github/Smcculle/gfspython/zmaster.py#issue_5ab4917add0fb20001000046
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Avoid deeply nested control flow statements.
https://codeclimate.com/github/Smcculle/gfspython/zmaster.py#issue_5ab4917add0fb20001000046