disable run when no fg pixels are selected

Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check

passed ghostflow-commit-check

passed smtk-endor-linux-shared-relwithdebinfo+pybind11

00:02:51

passed smtk-junction-osx-shared-release+pybind11

00:03:04

failed smtk-praxis-windows-shared-release

00:09:02

failed smtk-talosiv-osx-shared-release

00:01:37

pending smtk-endor-linux-shared-relwithdebinfo+pybind11
pending smtk-junction-osx-shared-release+pybind11
pending smtk-praxis-windows-shared-release
pending smtk-talosiv-osx-shared-release