Fix error in ghpython draw_mesh where an System.Array was expected

[tetov]

What type of change is this?

• Bug fix in a backwards-compatible manner.

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I added a line to the CHANGELOG.md file in the Unreleased section under the most fitting heading (e.g. Added, Changed, Removed).
• I ran all tests on my computer and it's all green (i.e. invoke test).
• I ran lint on my computer and there are no errors (i.e. invoke lint).
• I added new functions/classes and made them available on a second-level import, e.g. compas.datastructures.Mesh.
• I have added tests that prove my fix is effective or that my feature works.
• I have added necessary documentation (if appropriate)

[tetov]

SetColor with two arguments defaults to an overload that expects MeshFace, hence the four argument version.

I can't manage to display vertex colors in Rhino/Grasshopper though...

[tomvanmele]

@gonzalocasas @chenkasirer i can't provide reliable feedback when it comes to GHPython...

[chenkasirer]

LGTM.

[chenkasirer]

@tetov thanks for fixing this.
What do you mean you can't manage to display vertex colors though?

[gonzalocasas]

Nice! 👏
Can we merge?

[tomvanmele]

@gonzalocasas entirely up to you...