Fix bad array look-up in dot print

7 jobs for oruebel/vtk-m-refactor/add/hact in 0 seconds
Status Name Job ID Coverage
  External
passed cdash-buildbot

passed cdash-commit

failed ghostflow-branch-check-master

failed vtk-m-dragnipur-osx-shared-debug+32bit_ids+64bit_coords+clang+tbb

00:10:53

failed vtk-m-dragnipur-osx-static-release+64bit_coords+clang+tbb

00:19:22

failed vtk-m-osheim-windows-shared-debug+ninja-vs-2017+tbb

00:21:03

failed vtk-m-osheim-windows-static-release+ninja-vs-2017+tbb

00:28:35