Resolve memory leak in setupVars.c

[stumpylog]

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Fixes the simpler of the memory leaks. I've never actually done a pull request, so I've probably messed something up.

This template was created based on the work of udemy-dl.

[DL6ER]

This is wrong, it is not possible to return here since that would be skipping the for-loop altogether. Since I don't have write permissions on your fork, I'll open a new PR for this.