RFR: Avoid an empty line in footers for a comment-only review

[Robin Westberg]

Hi all,

Please review this small change that avoids putting an extra empty line in a bridged review comment, if the review
doesn't have a verdict.

Best regards,
Robin

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Commit messages:
 - Avoid an empty line in footers for a comment-only review

Changes: https://git.openjdk.java.net/skara/pull/499/files
 Webrev: https://webrevs.openjdk.java.net/skara/499/webrev.00
  Stats: 5 lines in 1 file changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/499.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/499/head:pull/499

PR: https://git.openjdk.java.net/skara/pull/499