cmq equation is wrong. need to update the parent function with vht calculation

Pull Request Checklist

Merge in the latest Develop branch changes to your branch
Remove .pyc files from your repository:
- Linux/Mac
  - find . -name *.pyc -delete
- Windows
  - del /S *.pyc
Run automatic regression and makes sure everything is passing
Did you make a new regression test that covers your new code?
Did you update your docstrings?
Did you update your headers to include your name and date?
Do a final compare with the Develop branch to be sure what you're changing

suavecode / SUAVE