auto updater prints fatal error outside of git repo

[JacobFischer]

1. Run Cerveau outside of a git repo
2. You'll get the following printed to the screen:

fatal: Not a git repository (or any of the parent directories): .git

The next line will be correct:

[18:37:41.856]  Lobby @ 12164  Updater Warning: Error trying to use Git, is it installed on your system?

Not a huge issue, but should be investigated what is printing that, and remove/fix it.