fix msvc OVERFLOW macro conflict

[fo40225]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

• Fixes #53

Type of change

Please select all relevant options:

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• python setup.py bdist_wheel

Test Configuration

• Operating System: Windows 10 1803 10.0.17134.706
• Python version: 3.7.3
• C++ compiler version: msvc 19.20.27508.1 (vs 2019)

Checklist

• [ ] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] I have added tests that prove my fix is effective or that my feature works

[Kautenja]

looks good!