[scale] fix NPE#8013

Closed

J-N-K wants to merge 2 commits intoopenhab:2.5.xfrom J-N-K:fix-8011

+14-2

Commits on Jun 25, 2020

fix NPE
J-N-K
committed

Commits on Jun 26, 2020

address review comments
J-N-K
committed