Fix an uninitialized value warning

Dependencies

• [2] RHUAFTJA Show aborted/cancelled builds separately in jobset eval pages
• [3] L7NUCXKS Show new and removed jobs
• [4] DE2DNCOI Allow comparing an evaluation with an arbitrary other evaluation
• [5] WZZOOYCH Show queued builds in jobset evaluation pages
• [*] U4TD3AIQ Add support for viewing jobset evaluations

Change contents

• replacement in src/lib/Hydra/Controller/JobsetEval.pm at line 94
  [3.1558]→[2.250:326](∅→∅)
  − if ($build->buildstatus == 3 || $build->buildstatus == 4) {
  [3.1558]

  [2.326]
  + if ($build->finished != 0 && ($build->buildstatus == 3 || $build->buildstatus == 4)) {