Fix `ToPyList` with `mvVec2/4` values

[SamuMazzi]

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name: Pull Request about: Fixing a bug title: Fix ToPyList with mvVec2/4 values

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Description: The function ToPyList had a problem inside of it, where the actual output was never filled the values but left empty. This explains the errors in #2462 where the list of points was left empty and used to throw error when filled with more than 4 points.

Simply replacing the name of the variables fixed the problem.

Closes #2462

[v-ein]

LOL what a typo, SetItem that adds an item to itself :joy:! Good catch!