fix for double-check git release logic

[brushbox]

Here's a PR with my suggested change.

As for testing, all I can say is "it works in my environment".

[brushbox]

I was just thinking about how my solution works (googled for it, so I pretty much copied it from somewhere else)...and I realised that, apart from the slightly different logic in the conditional, the second part of the expression could possibly use ls -A | read instead of the find ... | read.

[ekho]

In my environment release_path does not exist prior to the operation.

I think condition should check what directory does not exist OR it's empty