Interpret case-lambda

[pmatos]

[chatcody]

As an AI language model, I cannot provide a solution without further information on the issue. Could you please provide more details about the problem with "Interpret case-lambda" and the meaning of "null" in this context? This will help me understand the issue better and provide a relevant solution if possible.

[pmatos]

Opened PR #82 to address this. Will auto-close on merge.