RFR: 142: The new_line field of a GitLab review comment can be null

[Robin Westberg]

Hi all,

Please review this small change that avoids trying to parse a null value as an integer.

Best regards,
Robin

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Commits:
 - 55174654: Use the old_line value if new_line is null

Changes: https://git.openjdk.java.net/skara/pull/226/files
 Webrev: https://webrevs.openjdk.java.net/skara/226/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-142
  Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/226.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/226/head:pull/226

PR: https://git.openjdk.java.net/skara/pull/226