RFR: A repository without refs but with objects is healthy

[Robin Westberg via github.com]

Hi all,

Please review this minor fix that makes a repository without refs but with some objects flagged as healthy.

Best regards,
Robin

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Commits:
 - a4a30ab7:	A repository without refs but with objects should still be considered healthy

Pull request:
https://git.openjdk.java.net/skara/pull/68

Webrev:
https://webrevs.openjdk.java.net/skara/68/webrev.00

Patch:
https://git.openjdk.java.net/skara/pull/68.diff

Fetch command:
git fetch https://git.openjdk.java.net/skara pull/68/head:pull/68